Oscillators & Precision Rectifiers/Peak Detectors

Precision Rectifiers and Peak Detectors:

The precision rectifier, also known as a super diode, is a configuration obtained with an operational amplifier so that a circuit behaves like an ideal diode and rectifier. It is useful for high precision signal processing.

Peak detectors

 With a slight modification, the basic precision rectifier can be used to detect signal level spikes. In the following circuit, a capacitor holds the maximum voltage level of the signal and a switch is used to reset the sensed level. When the input Vin exceeds Vc (voltage across the capacitor), the diode is forward biased and the circuit becomes a voltage follower.

linear and nonlinear oscillators:

 Oscillators convert direct current (DC) from a power supply into an alternating current (AC) signal. They are widely used in many electronic devices. Common examples of signals generated by oscillators include signals transmitted by radio and television transmitters,