Title:
PHASE DIFFERENCE DETECTING CIRCUIT AND CONTROLLER
Document Type and Number:
Japanese Patent JP3027692
Kind Code:
B2
Abstract:
PURPOSE: To simplify the configuration of a controller by accurately detecting the phase difference of two signals with a slight phase difference and at the same time, using a phase difference detection circuit.
CONSTITUTION: The phase difference detection circuit 23 is constituted of a phase difference amplification circuit 21 for inputting two signals A and B which are repetitive and continuous waveforms with an inclination crossing an operation level and amplifying the phase difference and a waveform conversion circuit 22 for converting two signals A1 and B1 where the phase difference outputted from the circuit 21 is amplified, into square-wave signals A2 and B2, respectively. A controller is constituted of the phase difference detection circuit 23 and a microcomputer 16 for inputting two square-wave signals A2 and B2 where the output of the circuit 23, namely the phase difference, is expanded to input ports p1 and p2 and controlling an equipment 40 to be controlled according to the phase difference.
Inventors:
Kunihiro Hasegawa
Application Number:
JP28465694A
Publication Date:
April 04, 2000
Filing Date:
November 18, 1994
Export Citation:
Assignee:
Akai Electric Co., Ltd.
International Classes:
G01P3/44; G01C19/56; G01C19/5649; G01C19/5776; G01R25/00; (IPC1-7): G01R25/00; G01C19/56; G01P9/04
Domestic Patent References:
| JP5694828A | ||||
| JP573575U |
Attorney, Agent or Firm:
Takashi Ohsawa