CIRCUIT ARRANGEMENT FOR COMPENSATING FREQUENCY DEVIATIONS OF A VOLTAGE-CONTROLLED OSCILLATOR, USING A SECOND OSCILLATOR

摘要

The oscillation frequency of a non-externally voltage-controlled oscillator produces a control signal for the monolithic integrated voltage-controlled oscillator. This control signal is opposed to the influence of the operating temperature and the manufacturing parameters of the semiconductor chip in a similar way as the frequency of the voltage-controlled oscillator. The control signal is emitted through an iterative network consisting of a monostable multivibrator, a low-pass filter, and an amplifier. The iterative network produces an actuating signal for the voltage-controlled oscillator to counteract frequency deviations.