Title:
ノコギリ波発生装置
Document Type and Number:
Japanese Patent JP3991863
Kind Code:
B2
Abstract:
A sawtooth wave generating apparatus includes a base frequency generating section and a frequency generating section for generating the frequency of a reference signal, a sawtooth wave forming section which forms a sawtooth wave based on the reference signal, a voltage comparator which compares the voltage value of the sawtooth wave formed by the sawtooth wave forming section with a predetermined voltage value, a phase comparator which compares the phase of the output signal from the voltage comparator with the phase of the reference signal, and a low-pass filter (LPF) which cuts out a high frequency component of the output signal from the phase comparator, and feeds back the resulting output signal to the sawtooth wave forming section.
Inventors:
Kei Takeuchi Satoshi
Application Number:
JP2002382475A
Publication Date:
October 17, 2007
Filing Date:
December 27, 2002
Export Citation:
Assignee:
Seiko Epson Corporation
International Classes:
H03K4/50; H03K4/501; H03K4/502; H03L7/099; H03K3/0231
Domestic Patent References:
| JP2000175447A | ||||
| JP795769A | ||||
| JP6432517A |
Foreign References:
| US6265929 |
Attorney, Agent or Firm:
Tatsuya Masuda
Kazuo Asahi
Kazuo Asahi