Title:
An oscillating frequency equalization circuit, a semiconductor device, electronic equipment, and an oscillating frequency adjustment method
Document Type and Number:
Japanese Patent JP5908747
Kind Code:
B2
Abstract:
There is provided an oscillation frequency regulating circuit including: a measuring section that performs measurement based on an oscillation frequency of an oscillation circuit; a comparator section that compares a measurement value measured by the measuring section against a set comparison value over a set comparison duration; a setting section that sets a comparison value selected from a plurality of comparison values of different magnitudes and that sets in the comparator section the comparison duration according to the magnitude of the selected comparison value; and a regulation section that, based on the comparison result of the comparator section, regulates the oscillation frequency of the oscillation circuit such that the oscillation frequency that is measured by the measuring section becomes a target oscillation frequency.
Inventors:
Hosokawa Hirokazu
Application Number:
JP2012042138A
Publication Date:
April 26, 2016
Filing Date:
February 28, 2012
Export Citation:
Assignee:
LAPIS Semiconductor Co., Ltd.
International Classes:
H03L7/00; H03B5/20; H03K3/02
Domestic Patent References:
| JP9121158A | ||||
| JP5083125A | ||||
| JP2001285056A | ||||
| JP2001111389A | ||||
| JP10503611A |
Attorney, Agent or Firm:
Atsushi Nakajima
Kato Kazunori
Hiroshi Fukuda
Kato Kazunori
Hiroshi Fukuda