Video camera control circuit averaging control signals each obtained by adding or subtracting a previous control signal and reference correcting data in response to error data, with the reference correcting data being reduced for each polarity reversal

摘要

An automatic control circuit for a video camera includes an error detecting circuit for detecting and generating error data, a control signal generator supplied with the error data and generating a control signal, and a control circuit supplied with the control signal for controlling a controlled circuit for the video camera; wherein said control signal generator mixes reference correcting data generated from the error data with the control signal thereby to generate a new control signal, and the control signal generator includes a circuit for changing the polarity of the reference correcting data and decreasing the absolute value of the reference correcting data when the error data changes its polarity and a circuit for averaging the plural control signals each of which is generated when the reference correcting data is at its minimum value and the error data changes its polarity, the output of the averaging circuit being the control signal.