Title:
SWITCH CONTROLLING CIRCUIT
Document Type and Number:
Japanese Patent JPS60195624
Kind Code:
A
Abstract:
PURPOSE:To prevent magnetic deflection and to stabilize turning-on and turning-off control, by setting a making phase to the same as the interrupting phase of the previous time or its advanced one when the phase difference is within a prescribed value and setting the making phase to the same as the interrupting phase of the previous time when the phase difference exceeds the prescribed value. CONSTITUTION:A logical operation circuit 33 and the 2nd latch circuit 34 which holds data in accordance with the command of the circuit 33 are provided between the 1st latch circuit 23 and down counter 21 and the circuits 23 and 33 and circuits 23 and 34 are respectively connected with a bus line. Under this constitution, the circuit 33 calculates and controls making phases in such a way that, when the interrupting phase of the voltage at a controlling point is within a prescribed phase difference against an integral times of a power supplying cycle, the next making phase is set to the same as the interrupting phase of the previous time or advance by a prescribed phase. When the interrupting phase of the voltage exceeds the prescribed phase against the integral times, the next making phase is set to the same as the interrupting phase of the previous time. Therefore, stable turning-on and turning-off control can be made without causing any magnetic deflection.
More Like This:
| WO/1987/003713 | POWER CONTROLLER |
| WO/2001/050213 | SWITCHING REGULATOR WITH MULTIPLE POWER TRANSISTOR DRIVING VOLTAGES |
Inventors:
YAMAMOTO KAZUO
Application Number:
JP5086684A
Publication Date:
October 04, 1985
Filing Date:
March 19, 1984
Export Citation:
Assignee:
HITACHI MEDICAL CORP
International Classes:
G05F1/44; G05F1/45; (IPC1-7): G05F1/45
Domestic Patent References:
| JPS5467659A | 1979-05-31 | |||
| JPS57196499A | 1982-12-02 |
Attorney, Agent or Firm:
Nishiyama Haruyuki