Title:
CONTROL VOLTAGE SENSITIVITY CHANGEOVER CIRCUIT FOR PLL CIRCUIT
Document Type and Number:
Japanese Patent JPH10303744
Kind Code:
A
Abstract:
To provide a control voltage sensitivity changeover circuit for PLL circuit by which a lockup time is reduced and deterioration or the like in a C/N characteristic is prevented.
A Vc line between an output section of a loop filter and a control voltage input section of a VCO is constituted of an inductor L1 and a switch circuit SW, and a capacitor C1 are provided between ground and a midpoint of the L1 and the impedance of the Vc line is switched by turning on/off the switch circuit SW. Thus, the sensitivity of the control voltage is switched.
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Inventors:
TAKAYANAGI SHINICHIRO
FURUKUBO MASASHI
FURUKUBO MASASHI
Application Number:
JP10574697A
Publication Date:
November 13, 1998
Filing Date:
April 23, 1997
Export Citation:
Assignee:
MURATA MANUFACTURING CO
International Classes:
H03L7/093; H03B5/12; H03L7/107; (IPC1-7): H03L7/107; H03L7/093
Attorney, Agent or Firm:
Hisao Komori