Title:
直角位相クロックを生成する方法および装置
Document Type and Number:
Japanese Patent JP4045273
Kind Code:
B2
Abstract:
A quadrature clock generating apparatus includes a clock generator providing a double clock having a frequency that is twice that of a received reference clock. Divider circuitry is coupled to provide an alignment signal having half the frequency of the double clock. A recovery circuit recovers a first clock and a second clock from the double clock in accordance with the alignment signal. The first and second clocks have substantially a 90° phase difference.
Inventors:
Perry M Wyatt
Daniel A. Berklam
David T Newsome
Daniel A. Berklam
David T Newsome
Application Number:
JP2004353754A
Publication Date:
February 13, 2008
Filing Date:
December 07, 2004
Export Citation:
Assignee:
Hewlett-Packard Development Company
International Classes:
G06F1/06; H03K5/15; G06F1/04; G06F1/10; H03H11/16; H03K3/00; H03L7/06; H03L7/183; H04L7/04; H03K5/00
Domestic Patent References:
| JP8079029A | ||||
| JP7250113A | ||||
| JP7110725A | ||||
| JP3101412A | ||||
| JP2002152016A | ||||
| JP2000151369A |
Attorney, Agent or Firm:
Patent Business Corporation IPS