IC low-capacitance, low-frequency, low-current, non-radiating oscillator

摘要

An IC oscillator is disclosed using a small capacitor to determine the fundamental frequency. The capacitor is small enough to permit an on chip capacitor to be used. The capacitor is charged and discharged at the same rate between voltage limits established in the circuit. A single voltage controlled current source controls the charge and discharge currents equally so as to provide a relative low voltage-controlled frequency. The circuit can operate at very low charging currents so that a wide range of control is available. The circuit is configured to produce a very low radiation level.