Memory type automatic adjustment system

Details Memory type automatic adjustment system Memory type automatic adjustment system

H - Electricity

03

G

350/42

H03G 3/20 (2006.01) H04N 9/04 (2006.01) H04N 9/73 (2006.01)

Patent

CA 1126392

ABSTRACT OF THE DISCLOSURE A memory-type control system for producing and storing a control signal which is used in an automatic adjustment system. A signal, having a parameter to be controlled, is provided; and a detecting circuit detects when the parameter is within a pre- determined range. An UP/DOWN counter counts clock pulses and is responsive to the detecting circuit for counting in one direc- tion when the detected parameter is greater than the predetermined range, for counting in a second direction when the detected para- meter is less than the predetermined range and for ceasing its counting when the detected parameter is within the predetermined range. A parameter control circuit uses the count of the counting means as a control signal to adjust the parameter so as to bring said parameter within the predetermined range. A typical applica- tion of the automatic adjustment system is a white-balance control system for use with video camera apparatus.

297422

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