Title:
【発明の名称】赤外線センサー駆動回路
Document Type and Number:
Japanese Patent JP2801546
Kind Code:
B2
Abstract:
An improved infrared ray sensor driving circuit capable of advantageously controlling an amplifying level and a cut-off frequency of a filter by separating the functions of an amplifier and a filter, respectively. The circuit includes an impedance matching circuit for converting a high impedance of the signals detected to a low impedance signal, a first amplifying circuit for amplifying signals outputted from the impedance matching circuit by a first predetermined gain, a filtering circuit for filtering the signals outputted from the first amplifying circuit to pass frequencies of a predetermined bandwidth, and a second amplifying circuit for amplifying the signals outputted from the filtering circuit by a second predetermined gain.
Inventors:
Chosun Morn
Choi Jun Lin
Choi Jun Lin
Application Number:
JP31347894A
Publication Date:
September 21, 1998
Filing Date:
December 16, 1994
Export Citation:
Assignee:
LG Electronics Co., Ltd.
International Classes:
G01V8/12; G01J1/02; G01J1/04; G01J1/42; G01J1/44; G01J5/02; G01J5/10; G01J5/34; G08B13/191; H03F3/08; H03K17/94; (IPC1-7): G01J1/42; G01J5/02; G01V8/12; G08B13/191
Domestic Patent References:
| JP5340807A |
Attorney, Agent or Firm:
Takashi Ishida (3 others)