Title:
LOAD VARIATION CORRECTING CIRCUIT
Document Type and Number:
WIPO Patent Application WO/2004/075393
Kind Code:
A1
Abstract:
Even when the frequency of the oscillation signal of a voltage controlled oscillator is caused to vary in a wide range and a load circuit is caused to operate intermittently, the oscillation signal of the voltage controlled oscillator can be outputted in a stable manner. The load circuit (2) receives the oscillation signal of the voltage controlled oscillator (VCO)(1) and operates intermittently. A switch (3b) of an impedance correcting circuit (3) opens or closes, in response to the intermittent operation of the load circuit (2), to add to the input stage of the load circuit (2) an impedance (3a) having a difference between the input impedance of the load circuit (2) at the operation thereof and the input impedance of the load circuit (2) at the interruption of the operation thereof so as to keep constant the impedance of the load circuit (2) as viewed from the VCO (1).
Inventors:
MORIBE TSUYOSHI (JP)
AOKI KOUJU (JP)
AOKI KOUJU (JP)
Application Number:
PCT/JP2003/001829
Publication Date:
September 02, 2004
Filing Date:
February 19, 2003
Export Citation:
Assignee:
FUJITSU LTD (JP)
MORIBE TSUYOSHI (JP)
AOKI KOUJU (JP)
MORIBE TSUYOSHI (JP)
AOKI KOUJU (JP)
International Classes:
H03H11/30; H03J5/24; (IPC1-7): H03B1/00; H03B5/02; H03B5/04; H04B1/04
Foreign References:
| JP2001094447A | 2001-04-06 | |||
| JPH0934867A | 1997-02-07 | |||
| JPH02112040U | 1990-09-07 | |||
| JP2002094329A | 2002-03-29 |
Attorney, Agent or Firm:
Hattori, Kiyoshi (GE EDISON Bldg. Hachioji 9-8, Azuma-ch, Hachioji-shi Tokyo, JP)
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