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via Yuichun
CML Microcircuits has added 16-FSK modulation to the CMX7164 Multi-mode Wireless Data.
Addition of the 16-FSK constant envelope modulation enhances the flexibility of the modem enabling telemetry systems to evolve into higher data throughput without the need to move to a linear modulation scenario.
The CMX7164 covers both constant envelope and linear modulation schemes including: GMSK/GFSK, 2/4/8/16-level FSK, 4/16/64 QAM and enables customer-specific modulation schemes.
The CMX7164 operates at 3.3V and comes in VQFN/LQFP packaging.
Want to see through a visually opaque material? it’s easy with a thermal imaging camera and a bit of physics.
Dave also follows up on the cling wrap ESD issue with some measurements and alternatives.
Previous video – How To See Through Objects With A Thermal Camera
Anti-static bag myth
Forum HERE
Dave shows you a handy tip on how to see *through* your product using a Flir thermal imaging camera with the cover *on*. Thus being able to maintain the correct airflow, whilst at the same time being able to view the thermal map as if the cover was off!
Forum HERE
Google is building around 100 purpose-made self-driving cars – to add to its fleet of converted standard vehicles.
The vehicles will be very basic, and will not have a steering wheel, or control pedals.
“We’re now exploring what fully self-driving vehicles would look like by building some prototypes. They’ll be designed to operate safely and autonomously without requiring human intervention,” said the firm. “They will take you where you want to go at the push of a button. And that’s an important step toward improving road safety and transforming mobility for millions of people.”
Sensors remove blind spots, said the firm, and they can detect objects out to a distance of more than two football fields in all directions.
Speed in the first ones is capped at 25mph.
Although these are essentially research prototypes, they have been designed deliberately to look cute, and still have a space for passengers’ belongings, buttons to start and stop, and a screen that shows the route, alongside two seats with seat belts.
Initial vehicles will also have manual controls for road testing.
Indications are that Google does not intend to become a car maker, but does intend to take development on with partners.
Siemens is to eliminate costly rare-earth materials from its permanent magnet wind generators.
“Two rare earths are used in the magnet. one is difficult and costly to source, while the other is not,” said Henrik Stiesdal, CTO of Siemens Wind Power.
How this will be done is to be revealed late in June, at a seminar at CWIEME Berlin. Stiesdal said: “In my seminar I will explain how we have managed to decrease the share of the truly ‘rare’ rare earth and will eventually eliminate it from the magnets we make in a few years’ time.”
The firm has moved to permanent magnet generators to increase the reliability of its off-shore wind turbines – they can be driven directly by the rotor, eliminating the need for a gearbox. “These direct drive systems, powered by a permanent magnet generator, could run for years without maintenance – significantly increasing uptime,” it said.
Around half of the annual output of Siemens wind turbines now feature permanent magnet generators – they are incorporated into all new models as standard.
By only using affordable materials Siemens aims to make on-shore turbines directly competitive with fossil fuels in the next few years – and off-shore turbines within the next decade.
CWIEME Berlin a meeting place for the coil winding, insulation and electrical manufacturing communities. The dates are 24-26th June 2014, at the Messe Berlin.
Photo: Siemens has an order for two German offshore wind power plants: The company will supply 97 6MW 154m diameter wind turbines to the Danish energy provider Dong Energy. Total capacity for ‘Gode Wind 1′ and ‘Gode Wind 2′ is 582MW.
NXP has put together a reference design for attaching external sensors and switches to phones via the headphone jack – inspired by the University of Michigan’s Project HiJack.
The idea is that many apps can operate though a low bit-rate interface and do not need to tie-up the phone’s fast USB or Lightning interface – keyboards are an example.
“It gives mobile, consumer and industrial product designers simple, plug-and-go connectivity for adding features to a variety of applications, from wearable medical and fitness devices, gaming controllers, and toys, to diagnostics and maintenance tools,” said NXP.
“We initially designed HiJack to create a universal way to connect low-cost sensor devices to any brand of smartphone, tablet, or even PC,” said University of Michigan researcher Prabal Dutta.
Called ‘Quick-Jack‘, NXP’s version consists of a small board, a free example app, and design documentation.
The board has:
LPC812 microcontroller to handle decoding/encoding of the Manchester algorithm (left audio channel has the data) and communication with external peripherals.
A standard header for connection of sensors, switches, or data-collection devices.
A power circuit which draws power from the right audio channel to feed the board and attached components.
A miniature joystick, which controls the example app.
Source code for the LPC812 is free, and ready to use with NXP LPCXpresso tools.
There is an application competition.
Seeed Studio is another source of HiJack hardware.
Motor isolation for Automotive Safety Integrity Level (ASIL) requirements can be met without electromechanical relays, claimed Allegro MicroSystems.
To do it, it has introduced the A6861 for safety-critical automotive applications where motor isolation is an essential requirement – in electronic power steering and electric braking, for example.
All the chip needs is three power mosfets, and a few passives.
“This product range is designed to help customers to achieve ASIL-D certification with the highest ASIL rating possible”, said Allegro marketing director Steve Lutz. “Our A6861 is intended to replace a relay-driven motor disconnect in automotive safety-critical systems, and can also provide the drive for reverse battery protection and battery isolation.”
On board are three independent floating gate drive outputs to independently hold the mosfets ‘on’ or ‘off’ over the full 4.5-50V supply range in the presence of high phase-voltage slew rates. An integrated charge pump regulator is included to maintain 7.5V gate drive with 100kohm gate-source resistors.
With the addition of a few external components, it can also isolate the load when high load currents are present.
In typical applications the MOSFETs will be switched on within 8μs and will switch off within 1μs.
An under-voltage monitor checks that the pumped supply voltage is high enough to mosfets conduct properly.
Packaging is 16 lead thermal pad TSSOP.
As the three channels are separate, the chip and its mosfets can also control three separate loads.
There was a massive rise in venture capital investment in the UK and Ireland in Q1, says Ascendant, the technology-focused investment house.
Q1 venture capital in Q1 in UK and Ireland was £538 million, says Ascendant, compared to £287 million in Q1 2013.
“This extraordinary level of investment has not been experienced in the UK and Ireland since Q1 2001 – just after the peak of the market in November 2000,” says Ascendant managing director Stuart McKnight.
The £538 million was invested by 108 investors across 85 deals worth over £500,000 compared to 59 deals by 82 investors in Q1 2013.
“As much as it is great news that the market is booming, it should be noted that nearly all the growth was from investors backing London based digital media businesses,” says McKnight, “with few exceptions the rest of the market and the country missed out in this growth.
“So are we in a bubble?” asks McKnight, “there are signs that support such a thesis – runaway growth in transaction volumes, proliferation of incubators/accelerators, booming private investment, increasing number of VC professionals investing for their own account, many sub-sectors becoming cluttered with me-too competitors – I could go on. However we do not think that the market is overheated – at least not yet.”
Ascendant tracks a number of indicators to help identify areas of interest. One of these is levels of syndication.
In normal conditions, around 65% of UK/Irish tech investments are syndicated (i.e. have more than one investor). When syndication starts to drop below this it is usually an indicator of malaise – investors being overconfident, greedy or hasty and doing more deals on their own or being unable to find another investor to join them in the transaction.
Before the last crash syndication levels dropped briefly to just under 50%.
“In Q1 syndication sat at 61% which is not something we would worry about too much but we will be watching this closely for the rest of the year,” says McKnight, “secondly the key fundamentals are very different from 2000. The UK Government has put into place a number of tax based investment support schemes which have attracted private investors to the tech market. We believe and are told by the folks in Horse Guards Road that these will be with us for a good long while.”
“Thirdly,” continues McKnight, “the structure of the UK market has improved over the last 5 years. There is support of deals at all sizes and stages of development. For example in Q1, 50% of all deals were less than £3m compared to just £1.5m in Q1 2013. This supports the view that money is available to good companies as they grow and need to finance expansion. So we may well be in a golden period right now but we will continue to watch for overheating.”
The Q1 stats show that the value of investments is up 87%. Nearly all of this has come from a boom in internet/wireless services investing up from £51m to £340m. 51 digital media/services business were funded in Q1 vs 16 in Q1 2013.
So investors are not just financing a greater number of businesses but also committing more capital to them. Ascendant can identify no particular subsector getting more attention than others – fintech, fashtech, edtech, eattech, etc all collected investors’ money. Not surprisingly the vast majority of these businesses are based in London which experienced a huge inflow of capital in Q1 – £395m – equal 73% of all funds invested in the UK and Ireland. All other regions were static at best or more commonly down on last year.
“Fund raising outside of the M25 can be a challenging business,” says McKnight.
The strong growth of Q4 in 2013 was surpassed in Q1 and investment levels are the highest seen for 13/14 years. Ascendant sees no particular reason for this to drop off in the near or medium term.
There are more investors participating in the market, at both the private and institutional ends, which suggests a very good year for companies seeking investment.
“Given the usual seasonal investment patterns, our best guess for 2014 is that around 300 companies will receive £1.5 billion,” says McKnight, “it is too early to say what the run rate is for Q2 but there have been some notable transactions already. So let’s hope that the good pace of activity is maintained.”
The busiest Q1 investors were Balderton, MMC, Accel, Albion Ventures, Business Growth Fund, Episode 1, Frog Capital, Index and Passion Capital
61% of deals involved more than one investor
50% of deals involved investment of less than £3m
Private investors participated in 27% of VC deals, US investors in 9%, Euro investors in 5% and Corporate Investors in 13%.
The 10 biggest deals received 57% of funds invested, included: Borro (£67m), mPowa (£45m), Tradeshift (£45m), Intelligent Energy (£39m), eCommera (£25m), WorldRemit (£24m), AMCS (£19m), Hailo (£16m), Zopa (£15m) and Shazam (£12m)
There were three primary areas of investment focus –Internet/Wireless Services (£340m), Software (£83m) and Cleantech (£79m).
51 Internet/Wireless Services companies received VC backing. The largest Internet/Wireless Services deals were: Borro (£67m), mPowal (£45m), Tradeshift (£45m), WorldRemit (£35m), Zopa (£15m), FTBpro (£11m) and Brandtone (£11m).
In the Software sector, 16 companies received investment. eCommera (£25m), Shazam (£12m), Nexmo (£11m) and Bizzby (£6m) received the biggest VC cheques.
Just 8 Cleantech companies raised capital with the biggest deals being: Intelligent Energy (£39m), AMCS (£19m), 3Sun (£9m), Iceotope (£6m) and Bowman Power (£3m)
London completely dominated all other regions taking 74% of the value and 65% of the volume of tech investment
All other regions failed to reach even 10% of value or volume
Analog Devices is claiming to have industry’s highest accuracy isolated ΣΔ converter for dc and ac current and voltage measurement.
The AD7403 achieves 81dBmin signal-to-noise and distortion ratio (SINAD, at 78ksample/s over -40 to 125°C).
“Higher SINAD enables more accurate current and voltage measurement which improves the performance of motor drives by reducing torque ripple on the motor shaft,” said ADI.
It has a second-order, ΣΔ modulator that converts an analogue input signal into a single-bit data stream with on-chip digital isolation (1,250Vpeak) through on-chip transformers.
Operation is from 5V at the measurement end and it accepts a differential input signal of ±250mV (±320mV full-scale).
The analogue input is continuously sampled and converted to a ones-density bit stream with a data rate of up to 20MHz. The original information can be reconstructed with appropriate digital filtering to achieve 88 dB signal to noise at 78.1ksample/s.
Power on the output (and control) side is 5V or 3V.
It comes in a 16 pin wide-body SOIC.
Applications are expected in motor drives, solar inverters, and wind inverters.
AD7403 at a glance
5-20MHz external clock
16 bits, no missing codes
Typical offset drift: 1.5μV/°C
On-board digital isolator
On-board reference
True ±320 mV input range
>25 kV/μs common-mode transient immunity
Cree is claiming 200 lm/W from the latest in its 3.45×3.45mm XP series of lighting LEDs.
XP-L, as it will be known, delivers up to 1,226 lm at 350mA from its single die – the same die it is using in its 5x5mm XM-L2 lighting LEDs.
“XP-L LED enables an immediate performance increase of 50% or more as a drop-in upgrade for lighting designs based on XP-G LEDs,” said the firm.
This 200 lm/W LED follows hot on the heels of Lumileds’ 200 lm/W greenish Luxeon Lime LED announcement
Cree is aiming XP-L at high-intensity beam-forming applications where the small size allows them to be packed tightly together (0.5mm minimum spacing) to get more light from a given area compared with packing in the larger XM-L2s – the diameter of optics required to form a certain beam width is proportional to the diameter of the smallest circle that can be drawn around the emission area, so smaller emission diameter means more compact products.
Characterisation and binning is at 1050mA 85°C, and XP-Ls are available up to 90 CRI and ranging from 2,700 to 8,300K.
“As a ‘successor’ product to the XM-L2, lighting manufacturers seeking Energy Star qualification can use 3,000h of LM-80 data,” said Cree.
AVX is aiming at power supplies and pulse applications with a series of metallised polypropylene film capacitors.
Called the FM series, they span 0.01-0.47µF and 2kV-250V.
Non-inductively wound and encapsulated in a flame retardant plastic case sealed with self-extinguishing, epoxy, they featuring RoHS-compliant double metallised polyester film electrodes in series construction.
The firm is claiming high reliability at high current stress, high dv/dt capability, high moisture resistance, high capacitance stability, low losses, self-healing properties, and long useful lifetimes. Take a look at the FM Series data sheet to see what it means by this. For example, dV/dt capability varies from 45 to 9,000V/µs.
AVX is advocating these parts as electroitic alternatives: “Unlike aluminium electrolytics, film capacitors do not have a catastrophic failure mode,” it said. “Film capacitors simply experience a parametric loss of capacitance of about 2% from initial value, with no risk of short circuit. The capacitor continues to be functional even after this 2% decrease.”
Operating temperature is -40 to 105°C, and applications are expected in fast rise time pulse circuits, high voltage supplies, power converters, snubbers, and electronic lighting ballasts for compact florescent lamps and LEDs.
There are 17 case sizes (A-S), 14 voltages, three capacitance tolerances (±5, 10, and 20%), and two lead lengths (3.5 and 22mm).
Lead time is approximately eight weeks.