INTERFACE UNIT WITH NOISE SUPPRESSION FILTER Russian patent published in 1997 - IPC

FIELD: automatic control systems. SUBSTANCE: device has subtraction unit, which direct input serves as device input, connection unit, which first output line is connected to device output and second output line is connected to input of inertial unit which time constant is T and amplification gain K is 1. Output of latter unit is connected to inverting input of subtraction unit. In addition device has inertial unit which time constant is K₁ and amplification gain is T₁ and which input is connected to output of subtraction unit and output to input line of connection unit. Values of T, K₁ and T₁ conform to equation K₁/ω2o

=T•T₁, where ω_o is intermediate frequency which provides required value of maximal frequency ω_м of phase-frequency response of interface unit. EFFECT: increased reliability of positive phase shifts of input signal when noise in input is present; increased quality of regulation, increased service life and reliability of regulation unit. 4 dwg , 1 tbl