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Title:
VOLTAGE-CONTROLLED OSCILLATOR
Document Type and Number:
Japanese Patent JP2013187716
Kind Code:
A
Abstract:

To implement an oscillation at a stable frequency with a minor temperature characteristic on an oscillation frequency ceiling value.

A voltage-controlled oscillator having an input terminal for inputting an external voltage signal, a voltage-current conversion section for converting the input voltage to a current proportional to the voltage, and an oscillation section for generating an output signal at a frequency depending on the current includes an input impedance correction circuit provided with a plurality of resistors connected in series between the input terminal and a reference potential to set a constant input impedance, and configured to divide the voltage input from an input section by means of the resistors and output the divided voltage to the voltage-current conversion section via transistors for canceling a temperature characteristic of the resistors.


Inventors:
NAKAGOME KENJI
Application Number:
JP2012000051053
Publication Date:
September 19, 2013
Filing Date:
March 07, 2012
Export Citation:
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Assignee:
FUJI ELECTRIC CO LTD
International Classes:
H03K3/354; H03K3/02; H03K4/50
Domestic Patent References:
JP2007060588A2007-03-08
JPH11340797A1999-12-10
JP2001068976A2001-03-16
JPH06282340A1994-10-07
JP2000332600A2000-11-30
JP2007060588A2007-03-08
JPH11340797A1999-12-10
JP2001068976A2001-03-16
JPH06282340A1994-10-07
JP2000332600A2000-11-30
Attorney, Agent or Firm:
星野 裕司
渡辺 和徳



 
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