Title:
VOLTAGE CONTROLLED OSCILLATOR, RECEPTION MODULE, PORTABLE DEVICE, ONE-SEGMENT BROADCAST RECEIVER, MOBILE SATELLITE BROADCAST RECEIVING APPARATUS, AND TERRESTRIAL DIGITAL BROADCAST RECEIVING APPARATUS
Document Type and Number:
Japanese Patent JP2007116473
Kind Code:
A
Abstract:
To provide a voltage controlled oscillator capable of expanding a frequency variable range while stabilizing oscillation.
A voltage controlled oscillator 1a has a capacitor C2 provided between the collector and the emitter of a transistor Q1 for oscillation and has a coil L1 coupled to the base of the transistor Q1 for oscillation, and a variable-capacitance diode D2 arranged in parallel with the coil L1 with respect to the base of the transistor Q1 for oscillation is provided between the base and the emitter of the transistor Q1 for oscillation.
Inventors:
OIWA KOJI
Application Number:
JP2005306247A
Publication Date:
May 10, 2007
Filing Date:
October 20, 2005
Export Citation:
Assignee:
SHARP KK
International Classes:
H03B5/12
Domestic Patent References:
| JPH1013151A | 1998-01-16 | |||
| JPH1056330A | 1998-02-24 | |||
| JP2001237643A | 2001-08-31 | |||
| JPH09326635A | 1997-12-16 | |||
| JP2003017935A | 2003-01-17 | |||
| JP2000124736A | 2000-04-28 | |||
| JP2005175564A | 2005-06-30 | |||
| JPH04196604A | 1992-07-16 |
Attorney, Agent or Firm:
Kenzo Hara International Patent Office