Title:
DC POWER SUPPLY
Document Type and Number:
Japanese Patent JP3459052
Kind Code:
B2
Abstract:
PURPOSE: To step down the DC output and stop the operation of the object of power supply while avoiding the complication of a circuit and the use of an expensive switch.
CONSTITUTION: This DC power supply is equipped with a switching circuit to which the voltage error of DC output 131 is fed back through a photocoupler 5, step down regulator 9, which steps down DC output 121 to a specified voltage and supplies it to a microcomputer 8, and a step down control circuit 7 which steps down the voltage supplied to a television circuit 10 to the voltage corresponding to waiting by controlling an error detection circuit 6 when the microcomputer 8 directs waiting. Moreover, the voltage of the DC output 121 supplied to the step down regulator 9 in waiting condition is made the voltage by which the step-down regulator 9 can supply the microcomputer 8 with specified voltage.
Inventors:
Keiji Suzuki
Application Number:
JP26907794A
Publication Date:
October 20, 2003
Filing Date:
November 01, 1994
Export Citation:
Assignee:
Funai Electric Co., Ltd.
International Classes:
H04N5/63; H02M3/28; (IPC1-7): H02M3/28; H04N5/63
Domestic Patent References:
| JP190290U | ||||
| JP2114387U |
Previous Patent: MANUFACTURE OF MOS TRANSISTOR
Next Patent: DOCUMENT RETRIEVAL METHOD AND DEVICE THEREFOR
Next Patent: DOCUMENT RETRIEVAL METHOD AND DEVICE THEREFOR