Direct current controlled bridge type attenuator

Claim 1

A HIGH FREQUENCY SIGNAL ATTENUATOR COMPRISING A FOUR-SIDED BALANCED BRIDGE WITH FOUR RESISTIVE BRANCHES, A HIGH FREQUENCY SOURCE COUPLED ACROSS ONE DIAGONAL OF SAID BRIDGE, A HIGH FREQUENCY LOAD COUPLED ACROSS THE OTHER DIAGONAL OF SAID BRIDGE, THE RESISTANCES OF TWO COMPLEMENTARY BRANCHES OF SAID BRIDGE BEING CURRENTSENSITIVE, THE TIME CONSTANT OF SAID CURRENT-SENSITIVE RESISTANCE BEING GREATER THAN THE PERIOD OF SAID HIGH FREQUENCY, A DIRECT CURRENT BLOCKING CONDENSER IN EACH OF THE REMAINING TWO BRANCHES, A DIRECT CURRENT BLOCKING CONDENSER IN SERIES WITH THE HIGH FREQUENCY CIRCUIT ACROSS ONE OF SAID DIAGONALS, AND A SOURCE OF AUTOMATIC GAIN CONTROL CURRENT CONNECTED ACROSS THE LAST-MENTIONED BLOCKING CONDENSER FOR FINELY REGULATING THE SIGNAL CURRENT THROUGH THE CURRENT-SENSITIVE RESISTANCES AND FOR CONTROLLING THE DEGREE OF UNBALANCE OF THE BRIDGE, WITHOUT DISTORTION OF A SIGNAL.