Title:
OSCILLATION CIRCUIT
Document Type and Number:
Japanese Patent JP2007251376
Kind Code:
A
Abstract:
To generate a rectangular wave having a constant duty ratio at all times.
The oscillation circuit comprises an oscillator for oscillating a rectangular wave by comparing a saw-tooth wave with a reference voltage, and a negative feedback circuit which receives the rectangular wave, generates a voltage corresponding to its duty ratio, amplifies the difference of that voltage from a set voltage and feeds the amplified difference as a reference voltage to the oscillator. The oscillator oscillates the rectangular wave such that the voltage corresponding to the duty ratio becomes equal to the set voltage.
COPYRIGHT: (C)2007,JPO&INPIT
Inventors:
SOMA SHOTARO
Application Number:
JP2006069393A
Publication Date:
September 27, 2007
Filing Date:
March 14, 2006
Export Citation:
Assignee:
RICOH KK
International Classes:
H03K7/08; H03K4/06
Domestic Patent References:
| JPH0567951A | 1993-03-19 | |||
| JP2005295027A | 2005-10-20 |
Attorney, Agent or Firm:
Masahiro Ishino