Title:
SENSOR AMPLIFIER
Document Type and Number:
Japanese Patent JPH04236333
Kind Code:
A
Abstract:
PURPOSE:To provide a sensor amplifier for an automatic focus adjusting apparatus which can remove a direct current favorably in a small scale of circuit. CONSTITUTION:A series body of a resistance R2 and a transistor Q2 is connected in a feedback path of an amplifier G1. A collector of the transistor is connected to one input of the amplifier, and a capacitor C2 is connected between an emitter and a base of the transistor. Accordingly, noises can be removed in a small size of structure.
Inventors:
FUJIWARA AKIHIRO
TAMEKUNI YASUHIRO
AMIKURA TAKASHI
OHARA TORU
TAMEKUNI YASUHIRO
AMIKURA TAKASHI
OHARA TORU
Application Number:
JP476691A
Publication Date:
August 25, 1992
Filing Date:
January 19, 1991
Export Citation:
Assignee:
CANON KK
International Classes:
G01J1/44; G02B7/32; (IPC1-7): G01J1/44; G02B7/32
Attorney, Agent or Firm:
Keizo Nishiyama (2 outside)