Title:
【発明の名称】温度補償および周波数逓倍機能を備えた周波数シンセサイザおよびその製造方法
Document Type and Number:
Japanese Patent JP2000509219
Kind Code:
A
Abstract:
A frequency synthesizer (200) with temperature compensation and frequently multiplication. The synthesizer (200) having a temperature uncompensated frequency oscillator (202) coupled to a phase locked loop (206) including at least one temperature compensating and frequency multiplication element (208). The element (208) preferably being a multi-modulus divider. The element (208) is programmed by a control circuit (210) to vary as a function of temperature and to vary as a function of a fractional frequency multiplication factor. The element (208) also may provide adjustment of the nominal frequency of the frequency oscillator (202). The frequency oscillator (202) and preferably all the elements of the synthesizer (200) are temperature compensated by the element (208) to produce a temperature stable multiplied output frequency (238).
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Inventors:
Jirigu, Stephen F
Application Number:
JP53803397A
Publication Date:
July 18, 2000
Filing Date:
January 31, 1997
Export Citation:
Assignee:
MOTOROLA INCORPORATED
International Classes:
H03L7/18; G06F1/08; H03L1/02; H03L7/00; H03L7/08; H03L7/183; H03L7/185; H03L7/197; (IPC1-7): H03L7/08; H03L1/02; H03L7/00; H03L7/183
Attorney, Agent or Firm:
Shinsuke Onuki (1 person outside)