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Electronics News

• DIY Low Frequency Generator - Op-Amp Tester
  The oscillator was intended for other purposes, but unexpectedly its breadboard prototype became in great demand for evaluating the performance of operational amplifiers purchased on well-known Internet sites...
• Negative time-constant and PWM program a versatile ADC front end
  A variety of analog front-end functions typically assist ADCs to do their jobs. These include instrumentation amplifiers, digitally programmable gain, and sample and holds. This circuit is a bit atypical in merging all three of these functions...
• Pocket-size white noise generator for quickly testing circuit signal response. Part 1 - Noise discussion
  Noise in electrical circuits is typically the enemy, and any self-respecting circuit should output as little noise as possible. Nevertheless, there are cases where a well-characterized source of noise with no other signal is entirely the desired output...
• Phantom microphone power - the ghost in the machine
  Modern day recording and broadcast is a mixed bag for today's audio engineers when it comes to input signal chains. Microphone electronic technology really hasn't changed that much over the last 50 years...

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