Vertical convergence circuits

Abstract

Abstract 1. IN A COLOR TELEVISION RECEIVER, INCLUDING A VERTICAL DEFLECTION CIRCUIT FOR PROVIDING VERTICAL RATE DRIVE SIGNALS TO AN ASSOCIATED VERTICAL DEFLECTION YOKE, A CONVERGENCE CIRCUIT COMPRISING: FIRST AND SECOND INPUT TERMINALS ADAPTED FOR CONNECTION TO SAID DEFLECTION CIRCUIT, MAGNETIC FIELD PRODUCING MEANS INCLUDING AT LEAST A FIRST CONVERGENCE WINDING, AND FIRST AND SECOND CURRENT PATHS, BETWEEN SAID TERMINALS, SAID CURRENT PATHS COMPRISING, RESPECTIVELY, A SERIES COMBINATION OF A FIRST UNIDIRECTIONALLY CONDUCTIVE MEANS WITH A FIRST VARIABLE RESISTANCE MEANS AND A SECOND UNIDIRECTIONALLY CONDUCTIVE MEANS WITH A SECOND VARIABLE RESISTANCE MEANS, SAID FIRST CONDUCTIVE MEANS BEING POLED AND CONNECTED FOR CONDUCTING CURRENT THROUGH SAID WINDING WHILE BYPASSING SAID SECOND CURRENT PATH SO AS TO ISOLATE SAID FIRST CURRENT PATH FROM VARIATIONS OF SAID SECOND RESISTANCE MEANS DURING A GIVEN HALF OF EACH VERTICAL SCAN INTERVAL AND FOR BLOCKING CURRENT FLOW THROUGH SAID FIRST VARIABLE RESISTANCE MEANS DURING A COMPLEMENTARY HALF OF EACH VERTICAL SCAN INTERVAL, SAID SECOND CONDUCTIVE MEANS BEING POLED AND CONNECTED FOR CONDUCTING CURRENT THROUGH SAID WINDING WHILE BYPASSING SAID FIRST CURRENT PATH SO AS TO ISOLATE SAID SECOND CURRENT PATH FROM VARIATIONS OF SAID FIRST VARIABLE RESISTANCE MEANS DURING SAID COMPLEMENTARY HALF OF EACH VERTICAL SCAN INTERVAL AND FOR BLOCKING CURRENT FLOW THROUGH SAID SECOND VARIABLE RESISTANCE MEANS DURING SAID GIVEN HALF OF EACH VERTICAL SCAN INTERVAL. D R A W I N G

Inventors

• 👤 R Peter
• 👤 H Lambrich

Bibliographic Details