公开(公告)号：MY100603A

公开(公告)日：1990-12-15

申请号：MYPI19871887

申请日：1987-09-23

Applicant: MOTOROLA INC

Inventor： MAIN WILLIAN E ,  LUNN GERALD K ,  MCGINN MICHAEL

IPC: H02M7/21 ,  G01R19/22 ,  H02M7/217

Abstract: A RECTIFIER CIRCUIT (80) WHICH PRODUCES A NEARLY PERFECT FULL WAVE RECTIFIED OUTPUT SIGNAL IN RESPONSE TO RECEIVING A DIFFERENTIALLY APPLIED INPUT SIGNAL. THE RECTIFIER CIRCUIT COMPRISES A PAIR OF RECTIFIERS (88, 86, 90, 92 AND 102, 104, 106 RESPECTIVELY) THAT HAVE SUBSTANTIALLY IDENTICAL NON-LINER TRANSFER CHARACTERISTICS WITH THE FIRST ONE OF THE RECTIFIERS RECEIVING THE DIFFERENTIALLY APPLIED INPUT SIGNAL AT FIRST AND SECOND (82, 84) INPUTS. A CURRENT MIRROR (96) HAVING AN INPUT COUPLED AT A FIRST NODE (94) TO AN OUTPUT OF THE FIRST RECTIFIER PROVIDES AN OUTPUT SIGNAL AT AN OUTPUT THEREOF WHICH IS SUBSTANTIALLY IDENTICAL TO THE OUTPUT SIGNAL APPEARING AT THE OUTPUT OF THE FIRST RECTIFIER. THE SECOND RECTIFIER HAS AN OUTPUT CONNECTED AT A SECOND NODE (98) TO THE OUTPUT OF THE CURRENT MIRROR. A FEEDBACK CIRCUIT (100, 108) IS COUPLED BETWEEN THE SECOND NODE AND AN INPUT OF THE SECOND RECTIFIER TO CAUSE THE OUTPUT SIGNAL APPEARING AT THE OUTPUT OF THE SECOND RECTIFIER TO BE A FULL WAVE RECTIFIED VERSION OF THE DIFFERENTIALLY APPLIED INPUT SIGNAL. THE RECTIFIER CIRCUT IS SUITABLE FOR USE IN VIDEO DETECTOR SYSTEMS.@@(FIG. 3)