Title:
VOLTAGE CONTROLLED OSCILLATOR CIRCUIT
Document Type and Number:
WIPO Patent Application WO/2007/108348
Kind Code:
A1
Abstract:
A voltage controlled oscillator circuit wherein a voltage/current converting
circuit (310), which generates an input voltage converted current in accordance
with an input voltage, is cascaded with a current controlled oscillator circuit
(120) the oscillation frequency of which varies in accordance with the input
voltage converted current. The voltage/current converting circuit (310) includes
a first current source for outputting a current proportional to the input voltage
and also includes a plurality of second current sources each for outputting a
current proportional to a shifted version of the input voltage. A current, which
is obtained by adding the current outputted by the first current source to the
currents outputted by the plurality of second current sources, is outputted,
as the input voltage converted current to the current controlled oscillator
circuit (120).
Inventors:
OKA TAKASHI
WATANABE SEIJI
WATANABE SEIJI
Application Number:
PCT/JP2007/054821
Publication Date:
September 27, 2007
Filing Date:
March 12, 2007
Export Citation:
Assignee:
MATSUSHITA ELECTRIC IND CO LTD (JP)
OKA TAKASHI
WATANABE SEIJI
OKA TAKASHI
WATANABE SEIJI
International Classes:
H03K3/354; H03K4/501; H03L7/099
Foreign References:
| JP2003198333A | 2003-07-11 | |||
| JP2000134092A | 2000-05-12 | |||
| JPH05145412A | 1993-06-11 |
Attorney, Agent or Firm:
MAEDA, Hiroshi et al. (5-7 Hommachi 2-chome, Chuo-k, Osaka-shi Osaka 53, JP)
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