AUTOMATIC GAIN CONTROL DEVICE (DESIGN VERSIONS) Russian patent published in 1997 - IPC

FIELD: television; high-power amplifying channels. SUBSTANCE: device has four terminal network and amplifying channel inserted between device input and output, clock pulse input, reversing counter, two comparators, two reference-voltage sources, amplitude detector, and NAND gate (design version 1). AGC device of design version 2 has, in addition, series-connected buffer stage and peak detector inserted between amplitude detector and first comparator. EFFECT: provision for maintaining rated output-signal level and for immediate load disconnection in case of its abrupt increase or inadmissible level thereby ensuring reliable protection during accidents. 2 cl, 3 dwg