Title:
【発明の名称】比例弁駆動回路
Document Type and Number:
Japanese Patent JP2565985
Kind Code:
B2
Abstract:
A circuit for driving a proportional control valve (23) in accordance with control voltage (23) in accordance with control voltage comprises a differential amplifying circuit (61) for outputting a voltage according to a voltage difference between a positive input terminal and a negative input terminal, a proportional valve electrifying circuit (63) for electrifying the proportional control valve (23) by current according to the output voltage of the amplifying circuit (1), a means (67) for detecting a voltage dropping due to the valve (23) a negative feedback circuit (70) and a positive feedback circuit (68) for differentiating the dropping voltage to feedback it to the positive input terminal.
Inventors:
KURODA SHINJI
Application Number:
JP15296388A
Publication Date:
December 18, 1996
Filing Date:
June 21, 1988
Export Citation:
Assignee:
RINNAI KK
International Classes:
G05D7/06; F16K31/06; G05B11/00; H03B5/20; (IPC1-7): G05D7/06; F16K31/06; H03B5/20
Domestic Patent References:
| JP6334387A | ||||
| JP5092074A | ||||
| JP6384476U | ||||
| JP59178705U |
Attorney, Agent or Firm:
Kenji Ishiguro