Classic Peak Detectors. Some classic circuits are still going after many decades. One of them is the peak detector, in certain cases called the peak-hold circuit. A peak detector does just one thing – ...

Because half of the gain values are less than one, the circuit can be used as a peak detector with attenuation. The output voltage for this circuit is: V OUT = ­(R2/R1)V IN (pk) ...

An output greater than 1 V will be enough to overcome the threshold of peak-detector diodes D1 and D2 and, at the same time, turn off transistor Q3, which enables the RC-time constant of R10 and ...

As an extra flourish, [Duncan] added some hardware audio signal peak detection, fed from the speaker output, which was then sampled by the ATmega328P to be able to flash the lights in time with ...

In 1938, the Journal of Scientific Instruments published details of a comparator circuit that converted a slowly varying input signal into an abrupt change in output voltage. Based on cross-coupled ...

The diode bias current is created by a transistor-based peak detector circuit driven off the main audio signal. But don’t just take our word for it, watch the video after the break.