Title:
HIGH PERFORMANCE SIGNAL GENERATION
Document Type and Number:
Japanese Patent JP2005295544
Kind Code:
A
Abstract:
To provide a high performance phase detector including a local digital oscillator which generates a digital reference signal with a frequency and a phase controllable by a program.
The phase detector stores a phase difference between the digital reference signal and a sampled input signal, and creates an index of a phase error. The detector is used in a frequency synthesizer and has the advantage that it can generate a signal with a low phase noise and accurate phase control. In addition, the synthesizer of this kind is used like a building block in an ATE system and other electronic systems which generate a low-jitter clock and waveform.
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Inventors:
XU FANG
Application Number:
JP2005086535A
Publication Date:
October 20, 2005
Filing Date:
March 24, 2005
Export Citation:
Assignee:
TERADYNE INC
International Classes:
H03L7/085; G01R25/00; G01R25/04; G01R31/28; G01R31/317; G01R31/319; H03D3/00; H03D13/00; H03L7/00; H03L7/091; H03L7/16; H03L7/087; (IPC1-7): H03L7/085
Domestic Patent References:
| JP2003505948A | 2003-02-12 | |||
| JPH1174940A | 1999-03-16 |
Foreign References:
| US20020084856A1 | 2002-07-04 | |||
| US6252464B1 | 2001-06-26 |
Attorney, Agent or Firm:
Shogo Ehara
Hideka Tanaka
Yoshiyuki Shiraishi
Kunihiko Shiromura
Tsuyoshi Kumano
Hiroaki Yamane
Hideka Tanaka
Yoshiyuki Shiraishi
Kunihiko Shiromura
Tsuyoshi Kumano
Hiroaki Yamane
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