DEVICE FOR RECEIVING M-POSITION PHASE-PULSE SIGNALS Russian patent published in 1994 - IPC

FIELD: electric communication engineering. SUBSTANCE: device has phase detectors 1-8, logic unit 9, calculating unit 10, driven multivibrator unit 11, data signal detector 12, switch 13, mode-of-operation setting unit 14, seven phase shifters 15. Seventh and eighth phase detectors, sixth and seventh phase shifters, calculating unit 10, switch 13, and mode-of-operation setting unit 14 are introduced to improve noise immunity of device. In addition, logic unit 9 is eight-input and sixteen-output device. Phase detectors form eight channels for receiving M-position (M 2,4,8) phase-pulse signals wherein standard oscillations are ensured by shaper 16 and seven phase shifters. Data trains of signals differ in voltage polarity across outputs of phase detectors 1-8 and identified by unit 9 that has 24 logic elements. Calculations are formed for each type of signal in unit 10 having 20 OR gates by way of appropriate merging of outputs of unit 9. Unit 11 functions as storage items and actuates detector 12 which determines signal positioning. Unit 14 forms control voltages for switch 13 depending on type of signal. This makes it possible to vary conditions for shaping coherent carrier for each signal. EFFECT: improved design, improved noise immunity. 2 dwg, 1 tbl