Title:
INPUT CIRCUIT OF CONTROL VOLTAGE
Document Type and Number:
Japanese Patent JPS6043716
Kind Code:
A
Abstract:
PURPOSE:To improve the operability of the zero-point control by securing the margin of the input voltage corresponding to the zero point and avoiding the response to a slight shift of the input voltage. CONSTITUTION:A circuit 5 delivers the smaller one of two inputs, and a circuit 6 delivers the larger one of two inputs respectively. The voltage applied to a constant voltage input terminal 2 is supplied to the input terminal of one side of a comparator 7 as well as to the input terminal of one side of circuits 5 and 6 respectively. While the voltage supplied to a control input voltage terminal 1 is supplied to the input terminal of the other side of the circuit 5 via a fixed value adding circuit 3 as well as to the input terminal of the other side of the circuit 6 via a fixed value subtracting circuit 4. The output of the comparator 7 controls a switching circuit 8 so as to select the output of the circuit 6 when the control input voltage is higher than the constant voltage. Thus the constant voltage (d), the output of the circuit 5 and the output of the circuit 6 are obtained in case the control input voltage is approximate to the constant voltage P, lower than the voltage P and higher than the voltage P respectively.
Inventors:
TANNO TAKAO
Application Number:
JP15002283A
Publication Date:
March 08, 1985
Filing Date:
August 17, 1983
Export Citation:
Assignee:
NIPPON ELECTRIC CO
International Classes:
H03G11/08; G05F1/10; G05F1/575; (IPC1-7): G05F1/56; H03G11/08
Attorney, Agent or Firm:
Sugano Naka