DIVIDED SYNTHESIZER HAVING PHASE JITTER COMPENSATION

Title:

DIVIDED SYNTHESIZER HAVING PHASE JITTER COMPENSATION

Document Type and Number:

Japanese Patent JP2001352240

Kind Code:

A

Abstract:

To provide a frequency generator from a high speed and low power consumption equipment to be operated at a low voltage.

A plural section divided frequency synthesizer comprises a frequency generator, a voltage controlled oscillator, a programmable variable N divider, a phase compensator, an integrating and filter circuit, a time window generator, a weighting current source, a phase accumulator and a charge pump circuit having a plurality of transistors. The current source is connected to the charge pump circuit to directly control a current of an emitter of the one or more transistors of the charge pump circuit. The synthesizer is used for a frequency synthesis of a GSM and/or a GPRS.

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Inventors:

DINH HUU-THINH
PERIS DANIEL
NADAL GHYSLAIN

Application Number:

JP2001113322A

Publication Date:

December 21, 2001

Filing Date:

April 11, 2001

Export Citation:

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Assignee:

THALES SA

International Classes:

H03L7/089; H03L7/183; H03L7/093; H03L7/197; (IPC1-7): H03L7/093; H03L7/183

Attorney, Agent or Firm:

Yoshitaka Sonoda (1 outside)

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