It is hard to imagine a time when integrated circuit
comparators were a big deal, but as recently as 1973 when this article appeared in
Popular Electronics, they were new to a designer's bag of tricks. Prior to an
IC solution, comparators needed to be constructed from opamps and a handful of peripheral
biasing components. As with other integrated circuits, not only does the overall price
go down, but so does circuit board real estate, cost, temperature variability, and electrical
parameter variance between devices. The first comparator circuit I remember designing
was a temperature sensor that went in an oven used for curing the potting ...
"Researchers at Tokyo Institute of Technology
have announced a
Bluetooth Low-Energy transceiver with the lowest ever power consumption,
designed for use in the popular 2.4 GHz band. The breakthrough set to accelerate widespread
adoption of Internet of Things (IoT) applications was developed by a group of researchers
led by Kenichi Okada of Tokyo Institute of Technology, Japan. When transmitting, the
transceiver consumes 2.9 milliwatts (mW) and when receiving, it consumes ..."
The Electronics Handbook, Second
Sometimes it's still nice to have a hard copy reference
book on hand rather than clicking through a PDF file. This 2640-page, 2nd edition of
The Electronics Handbook, published by CRC, is such a book.
Peruse the "Look Inside" page samples and you will see it is like a compilation of undergraduate
textbooks plus table, charts, and graphs chock full of data. Analog, digital, RF and
electric power topics are included. Check it out ...
It appears that maybe Abraham Lincoln had a son
who was an electrical engineer working at Motorola Semiconductor back in the 1960's.
Put glasses on Honest Abe (I did) and author Irwin Carroll's a spitting image of the
Great Emancipator. Seriously though, this article is a great introduction to the fabrication
and use of variable
capacitance (aka varicap and varactor) diodes. They have been - and still are - used
widely for electrically tunable oscillator and filter circuits. Topics such as temperature
and figure of merit ("Q") are discussed as well. This edition of Electronics World
ran a series ...
This article on computer mouse inventor
Douglas Engelbart appeared in the January 2018 issue of Smithsonian
magazine. I like the opening paragraph by author Valarie Landau, who happened upon a
1968 film while researching for a documentary. "On December 8, 1968, Douglas Engelbart
sat in front of a crowd of 1,000 in San Francisco, ready to introduce networked computing
to the world. Engelbart was no Steve Jobs. He was a shy engineer with no marketing background.
His goal was to speak directly to other engineers, showing them that they could use computers
in new ways to solve complex ..."
Gowanda Electronics, a designer and manufacturer
of precision electronic components for radio frequency and power applications, announces
the expansion of its SML32S series of wirewound, shielded, molded
RF surface mount inductors in the
"1210" style. This expansion increases the number of individual parts in the series by
more than 20% and broadens the inductance range by adding values from 120 µH to 470 µH.
The expansion was done in order to address the market need for higher inductance shielded
inductors in RF applications ...
Bliley Technologies has been manufacturing oscillators
and crystals in Erie, Pennsylvania, since 1930. That's pretty amazing. Bliley's 64,000
square foot facility is only a few miles from my home. The
Erie Times-News published a feature article on them in today's edition
that has some photos from inside the plant. Note the stack of vintage-looking test equipment
on the benches in the background (high-res). Despite its rather run-down appearance, Erie and
the surrounding area is home a lot of high-tech industries including plastics, electronics,
metal plating, industrial electrical equipment, and medical paraphernalia. The crime
and cost of living are low here ...
"Church spires across the UK will be used to boost digital connectivity
in rural areas following an agreement between the Government and the Church of England.
The accord, signed by the the National Church Institutions (NCIs) of the Church of England,
the Department for Digital, Culture, Media and Sport (DCMS) and the Department for the
Environment, Food and Rural Affairs (Defra) encourages the Church of England to use its
buildings and other property to improve broadband, mobile and WiFi connectivity for local ..."
"Texas Instruments said 'yes' in an ISSCC paper
devoted to a single-chip 76-81 GHz frequency-modulated continuous wave (FMCW) radar transceiver in 45 nm CMOS, which includes three transmitters,
and four receivers with integrated ADCs. To support system-level functional safety, the
design also features autonomous fault monitoring of the RF chain. The fast-chirp FMCW
signal is generated in a closed-loop 19-20.25 GHz fractional-N frequency synthesizer,
fed from a high frequency reference clock via ..."
BeRex continues to expand its family of RF switches
by announcing the availability of the
a high isolation, SPDT RF switch with high linearity, low insertion loss, and a very
fast, 90 to 135 ns, switching time making it ideal for demanding wireless switching
applications such as Wi-Fi, CATV IoT and 5G applications. Using a single 2.7 to 3.6 V
supply voltage, the BSW7221 switch provides a wide 1 to 6000 MHz frequency range ...
It's getting harder for companies to have their
online advertisements seen by potential customers thanks to the popularity of ad blockers.
Now, Google is building the ability into its own browser. "Google's browser doesn't go
as far as full-on
ad blockers and won't always stop ad trackers. But already it's cut
ads on 42% of websites it's tangled with. What was once unthinkable - that Chrome would
block online ads, Google's lifeblood - becomes reality on Thursday. That's when Chrome
takes a significant step in the direction that hundreds of millions of us already have
gone by installing
ad blockers. Chrome stops far ..."
Did you think that holiday celebrated on the 3rd
Monday in February is "Presidents Day?" I assumed so given the prevalence of "Presidents
Day." Well, it maybe so for some states, but the Office of Personnel Management's calendar
still lists it as "Washington's Birthday." The
White House put out a story about it on Monday. Better late than
Southwest Antennas, an industry leader in rugged
RF / Microwave antenna
and accessory products, has released a new line of tri-band antenna solutions designed
to cover several popular sub-bands across the L, S, and C Bands. These omni-directional
antennas are tuned for high performance operation in the following frequencies: 1.70
- 1.85, 2.2 - 2.5, and 4.4 - 5.0 GHz. For users who expect to utilize these bands or
deploy multi-band radio systems, tri-band antennas can ...
"The Dynamic Spectrum Alliance (DSA) has approached
the Federal Communications Commission (FCC) regarding its discontent over the proposed
changes in the CBRS band rules. According to the DSA, the changes to the Priority Access
License (PAL) and other rules, first requested by petitioners and now proposed by the
Commission, are both unnecessary and counterproductive to enabling the fullest use of
the Citizens Broadband Radio Service (CBRS) band. In its NPRM, the FCC proposed changes
which included increasing the length of license terms from three ..."
ConductRF provides 3 styles of solution for
DAS applications in Stadiums,
Malls, Campuses, Hotels and more. Straight & R/A Low PIM Connectors are available
for 7/16, N, SMA, QMA, 4.1/9.5 and 4.3/10 interfaces. We also offer Low PIM Adapters
and PIM Test Cables for all these series. Utilizing ConductRF's new Low PIM Direct Solder
Attachment Connectors, we provide high performance solutions for Low PIM interconnect
including Straight, Right Angle, Bulkhead and Panel attachment. Performance better than
-155dBc is validated through 100% testing ...
U.S. National Science Foundation Clamps down on Misconduct
Netherlands Planning Massive Solar Energy Farm at Sea
Rise of Tech Giants May Be Bad News for Economy
Heaviest Element Could Have Fascinating Atomic and Nuclear Spectra
FCC Releases Report on Internet Access Services
Employees at Apple's New Campus Are Walking into the Glass Panes
Qualcomm Offers Previews of Its 5G Chipsets, Services
FY19 Defense Budget Calls for Big Boost for DIUx
Precision Experiments Reveal Gaps in van der Waals Theory
Anatech Electronics, a manufacturer of RF and microwave
filters, has published its February newsletter. In it, Sam Benzacar writes in "The Magic
in Sprint's Magic Box" about how Sprint, which "has always been the Number Four wireless
carrier," is surreptitiously catching up because of the widespread distribution of its
personal cell extenders. Sam has a lot of insight into the wireless business through
decades of keeping his finger on the pulse of the industry, and has written much about
it. These monthly newsletters always provide good tidbits you likely won't find elsewhere ...
Josephson effect was predicted in 1962 by British physicist Brian David Josephson.
It postulated the possibility of a resistance-less path for electrical current across
an extremely thin insulator sandwiched between two superconductors. Dr. Juri Matisoo,
of IBM, is credited with building the first Josephson junction switch in 1967, demonstrating
sub-nanosecond switching times. Back in the day, superconducting materials, like graphene,
were resources available only to well-funded research establishments like major corporations,
universities, and government facilities. Now, anyone with an interest can order both ...
"Back in 1998, who would've predicted the wireless
technology's current ubiquitousness? Can you believe it? Bluetooth is 20 years old. My,
my, how time flies. Who would have thought back in 1998 that this nascent technology
would become an important part of our lives? Today BT is everywhere. Go ahead and count
up the number of BT radios you use every day. Be amazed. Taking inventory, I determined
today that I must own about a half-dozen BT radios. It appears in our smartphones, our
Rohde & Schwarz has published this application
note on eCall. "Emergency Call (eCall)
is a service provided in Europe with the goal of reducing response times for acci- dents
or other emergencies on the roadways. This application note briefly describes the technology
behind eCall and presents conformance tests for eCall using the R&S ® CMW500 RF tester
and the R&S ® SMBV100A vector signal generator. A Test software for eCall makes it
quick and easy to perform these tests with the GSM or WCDMA wireless communications standard.
It also shows a test solution for GNSS performance tests for eCall using ..."
RIGOL Technologies announces a significant addition
to its portfolio of RF Test Instrumentation with the introduction of the
New RSA5000 Real-Time
Spectrum Analyzer. The RSA5000 combines the power of a high performance swept spectrum
analyzer with superior Real-time performance unmatched in this product category. Available
in 3.2 GHz and 6.5 GHz models all RSA5000 Series Analyzers provide Resolution
Bandwidth (RBW) down to 1 Hz, a noise floor as low as ...
KR Electronics has released part number 3337+,
which is a 1208
MHz lowpass filter. The filter is a selective elliptic type filter. The stopband
starts at 1292 MHz and is maintained to >6 GHz. The filter is supplied in
a miniature surface mount package measuring 0.20" x 0.30" x 0.18". Other frequencies
and bandwidths are available. Data sheets are available ...
On many occasions in both the lab and on installed
equipment I have run into "unexplainable" problems of signal leakage and/or crosstalk
that ended up being poor
ground issues. Ground loops can be particularly frustrating. This
new book written by the highly experienced and regarded H. Ward Silver, with degrees
from both universities and The School of Hard Knocks, will be a valuable resource for
your own situations. A mere $23 investment could be invaluable ...