Supply circuit for equipment frequently on standby, comprises autofeeding circuit and voltage doubling starting circuit to start integrated circuit which controls interruptor in transformer primary

摘要

The supply circuit consists of an alternating current supply (100) and rectifier(101) which feed a primary winding (103) connected to a switch (105) operated by an integrated circuit (109,110). A voltage doubling starting circuit (118) stores energy in a capacitance (300) during an initial start and supplies it to the integrated circuit subsequently using switches (303,404). After start operation is supplied by an autofeed circuit (107)