NOISE REJECTION DEVICE FOR BROAD-BAND SIGNAL RECEIVERS Russian patent published in 1998 - IPC

FIELD: radio engineering. SUBSTANCE: device has series- connected first subtractor 1, first multiplier 2, first band filter 3, adjustable phase shifter 4, second multiplier 5, second subtractor 6, attenuator 7 whose output is connected to one of inputs of first subtractor 1 and to that of adjustable- gain unit 13. Output of copy signal generator is connected to one of inputs of first, second, and third multipliers. Inputs of first, second, and third subtractors are combined and function as device input. Output of third subtractor 14 is also connected to input of third multiplier 12 and functions as device output. Output of third multiplier 12 is connected to other input of third subtractor 14 through series-connected second band filter 8, amplifier 9, AGC detector 10; unit 13 is connected to other input of third subtractor 14. EFFECT: improved design. 2 dwg