Abstract: A signal detector whose output voltage approximates the true average to peak value of an applied signal of a generally arbitrary waveform employs current sources to regulate the charge-discharge duty cycle of an integrating storage device. The integrating storage device, such as an integrating capacitor, is employed in a high gain circuit with negative feedback to develop a signal representative of the peak level of the applied signal. The device approaches true peak detection over a wide dynamic and frequency operating range relative to known prior art at peak detection devices.

Abstract: An LC-type oscillator employing a differential amplifier to switch a tank circuit in response to a feedback signal. A voltage controlled variable capacitor is employed to control the frequency of oscillation. The bias across the variable capacitor is closely controlled to avoid errors in the frequency of oscillation during the period of startup, which would otherwise create an undesired error in the oscillation frequency.