It is now 100 years since Alexander Nicholson at Bell Telephone Laboratories built and patented the first crystal oscillator, and crystals are still the main source of accurate oscillations up to UHF frequencies using quartz instead of Rochelle Salt (see US patent 2212845). Quartz crystal oscillators use the piezoelectric effect. The piezoelectric effect refers to […]
Clock management fanout buffer line expanded to seven new devices
Microsemi Corporation announced four new miClockBuffer products and three new miSmartBuffer products in its portfolio of clock management fanout buffers. The ZL40230, ZL30235 and ZL30240 miSmartBuffer and ZL40231, ZL40234, ZL40241 and ZL40260 miClockBufferdevices further expand Microsemi’s broad lineup of high performance products targeted to a variety of applications within the communications, data center and enterprise markets. The ZL40231, ZL40234, ZL40241 and ZL40260 provide customers with single-ended […]
Low-jitter, low-power clock chips target coin-cell battery operated IoT sensors
SiTime Corporation introduced the SiT1569 oscillator and SiT1576 Super-TCXO with expanded frequency range. These unique timing solutions, available in a tiny CSP (chip-scale package), enable coin-cell battery operated IoT sensors to run up to 10 years. By using SiTime’s revolutionary TempFlat™ MEMS and mixed-signal technology, these devices deliver increased timekeeping accuracy and system power savings. The ultra-reliable, low-jitter SiT1576 and […]
Top analog threads on EDAboard.com – May
(editor’s note: Intrigued by the problem? Have a question or another solution? Then click the “Read more” link and follow the conversation on EDAboard.com or log in to EDAboard and participate in the analog forum threads.) Flyback source and magnetic air gap – I was studying dc-dc converters because I want to do a flyback voltage […]
Free-running reference oscillators span 10 MHz to 100 MHz with low phase noise
Pasternack has released six new free-running reference oscillators that generate a highly stable and accurate output frequency response with low phase noise and spurious performance levels, making them ideal in phase locked loops, function generators, frequency synthesizers and receivers for communication, radar, navigation, surveillance and test and measurement applications. These free-running, fixed-tuned oscillators use a high-stability […]
What is a clock and what are its critical parameters (Part 2)?
The performance of a clock function, which includes the crystal and associated circuitry, is defined by parameters which are measured over both the short term and long term. It is also characterized by change in specifications due to temperature variations, aging, and mechanical considerations such as vibration and shock. How is clock performance defined? Both […]
What is a clock and what are its critical parameters (Part 1)?
The “clock” function is a standard part of nearly every electronic system, with very few exceptions. Behind this simple-sounding, commonplace word, there is an array of complexity and subtlety in definition, performance, and design. Clocks are both vital and ubiquitous, so it is worth understanding the different functions they fulfill, they ways they can be […]
Top analog threads on EDAboard.com – February
(editor’s note: Intrigued by the problem? Have a question or another solution? Then click the “Read more” link and follow the conversation on EDAboard.com or log in to EDAboard and participate in the analog IC forum threads.) Making gain positive and NF less than 7.0 dB – I have designed a mm-wave amplifier, as I intend to […]
Gunn Diode oscillator operates at 24.125 GHz
Fairview Microwave Inc. has released a waveguide Gunn oscillator that provides a cost-effective source for microwave power with excellent frequency and power stability while generating low-phase-noise. Typical applications include transmit and receive oscillators for radio communications, local oscillator source that can be multiplied for higher mm-wave frequency test and measurement, military and commercial radar sources, police radar, Doppler […]
Crystal units allow for higher-density mounting and use in low profile, IoT devices
Murata Americas today introduced several miniaturized, highly advanced crystal units developed specifically for the IoT market. The company used its proprietary technology and volume production capability to design a product line that excels in quality and reliability, while also providing a cost effective solution. The series features a compact package that allows for higher-density mounting and use in lower profile devices. Target applications include IoT, mobile […]
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