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Patent Searching and Data


Title:
VOLTAGE CONTROL OSCILLATOR
Document Type and Number:
Japanese Patent JPH10163750
Kind Code:
A
Abstract:

To independently optimize C/N characteristics and the like in plural oscillating frequency bands without enlarging an oscillator and without giving complicated switch constitution by connecting the output terminals of plural oscillation means to the input terminals of a buffer means by means of the capacity connection of low capacity.

The oscillation means 5a and 5b oscillating the signals of the different frequency bands and the common buffer means 6 are provided. The output sides of the oscillation means 5a and 5b are connected to the input side of the buffer means 6 by the capacitors C51 and C52 of low capacity. When power is supplied from a power terminal 1a to one oscillation means 5a and power is not supplied to the power terminal 1b of the other oscillation means 5b, only one oscillation means 5a operates and the other oscillation means 5b does not operate. Since power is supplied from a power terminal 1c to the buffer means 6, the buffer means 6 operates. In such a case, the signal of a frequency corresponding to DC voltage applied from a frequency control terminal 2 is outputted from an output terminal 3.


Inventors:
HAYASHI KATSUHIKO
Application Number:
JP1996000316408
Publication Date:
June 19, 1998
Filing Date:
November 27, 1996
Export Citation:
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Assignee:
TDK CORP
International Classes:
H03B5/02; H03B5/12; H03B5/18; H03J5/24; (IPC1-7): H03B5/18; H03B5/02; H03B5/12
Attorney, Agent or Firm:
若田 勝一