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Title:
OSCILLATOR AND ELECTRONIC APPARATUS USING THE SAME
Document Type and Number:
Japanese Patent JP3915530
Kind Code:
B2
Abstract:

PROBLEM TO BE SOLVED: To provide an oscillator which generates a stable oscillation waveform, when the change in an environmental temperature is large.
SOLUTION: In a first voltage source, a first divided voltage, wherein a DC power source is divided into a plurality of parts by using resistors or the like is connected with an emitter follower of a second transistor via an emitter follower of a first transistor. In a second voltage source, a second divided voltage is connected with an emitter follower of a fourth transistor via an emitter follower of a third transistor. The first voltage source and the second voltage source are connected with both ends of a first resistor. One input of a comparator is connected with the emitter follower of the fourth transistor. A capacitor, a charging circuit for charging the capacitor and a discharging circuit for discharge are connected with the other input. By the output of the comparator, a current is made to flow in the first resistor, and the discharging circuit is subjected to on/off control.


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Inventors:
Takuya Nishide
Koji Yoshida
Application Number:
JP2002025133A
Publication Date:
May 16, 2007
Filing Date:
February 01, 2002
Export Citation:
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Assignee:
Matsushita Electric Industrial Co., Ltd
International Classes:
H03K3/282; H03K4/06; (IPC1-7): H03K4/06; H03K3/282
Domestic Patent References:
JP62104214A
JP2046017A
JP5327428A
JP9046188A
JP11214971A
Attorney, Agent or Firm:
Fumio Iwahashi
Hiroki Naito
Daisuke Nagano