Title:
三角波発生回路、それを用いたインバータ、発光装置、液晶テレビ
Document Type and Number:
Japanese Patent JP4685602
Kind Code:
B2
Abstract:
A first comparator compares an output voltage Vout appearing at a capacitor with a maximum threshold voltage Vmax. A second comparator compares the output voltage Vout with a minimum threshold voltage Vmin. An edge detection circuit detects an edge of a synchronization signal SYNC having approximately ½ of frequency of the output voltage Vout and outputs an edge detection signal SE. A charge-discharge control unit refers to the first and the second comparison signal, and sets the charge-discharge circuit to a discharging state when the output voltage Vout becomes higher than the maximum threshold voltage Vmax and sets the charge-discharge circuit to a charging state when the output voltage Vout becomes lower than the minimum threshold voltage Vmin. When the edge signal SE becomes the predetermined level, the charge-discharge control unit switches the charging state and the discharging state of the charge-discharge circuit.
Inventors:
Fukumoto Kenichi
Application Number:
JP2005332203A
Publication Date:
May 18, 2011
Filing Date:
November 16, 2005
Export Citation:
Assignee:
ROHM Co., Ltd.
International Classes:
H03K4/06; H02M7/48
Domestic Patent References:
| JP55100737A | ||||
| JP62169514A | ||||
| JP3155366A | ||||
| JP8293767A | ||||
| JP2000138567A | ||||
| JP2003274668A | ||||
| JP2004242403A | ||||
| JP2004247828A |
Attorney, Agent or Firm:
Sakaki Morishita