Title:
ZERO CROSS PULSE GENERATING CIRCUIT
Document Type and Number:
Japanese Patent JPS5875918
Kind Code:
A
Abstract:
PURPOSE: To generate a normal zero cross pulse by outputting an inverter output and a variation detecting circuit output selectively as the zero cross pulse.
CONSTITUTION: A full-wave or half-wave rectified voltage VIA or VIB from an AC power source is inputted to an inverter 1, whose output V1 is supplied to a changeover switch 3a. A variation detecting circuit 2 generates an output pulse signal V2 synchronizing with level variation points (from H to L and from L to H) of the output V1 of the inverter 1, and output contacts NO and NC of a switching circuit 3 associated with a changeover switch 3 select the output V1 or output V2 to be outputted as a zero cross pulse, thus generating the normal zero cross pulse.
Inventors:
TANAKA OSAMU
FUKAGAWA HITOSHI
SUZUKI YOSHIHARU
KOMODA YOSHIYUKI
FUKAGAWA HITOSHI
SUZUKI YOSHIHARU
KOMODA YOSHIYUKI
Application Number:
JP17536181A
Publication Date:
May 07, 1983
Filing Date:
October 31, 1981
Export Citation:
Assignee:
MATSUSHITA ELECTRIC WORKS LTD
International Classes:
H03K5/1536; (IPC1-7): H03K5/153
Attorney, Agent or Firm:
Ishida Choshichi