JPH02119701U - - Google Patents

Description

[Brief explanation of drawings]

FIG. 1 is a connection diagram showing an embodiment of this invention, FIG. 2 is a connection diagram when this invention is applied to a high frequency matching circuit, and FIG. 3 is a connection diagram showing a conventional circuit. IC1 is a preset counter, Rf1 to Rf4
is a feedback resistor, D1 to D4 are set value input terminals, Q1
~Q4 is the set value output terminal, PR is the preset signal input terminal, UP is the set value change pulse input terminal (increase), DN is the set value change pulse input terminal (decrease)
, S10 is a manual/automatic changeover switch, S11
is a manual data setting switch, IC2 is a microprocessor, P1 to P4 are input/output terminals, IC3 is a setting signal current amplification IC, K1 to K4 are matching circuit capacitor switching relays, C1 to C4 are matching capacitors, and L1 is for matching. inductor. Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims (1)

[Claims for Utility Model Registration] In a setting circuit that is connected between a control circuit and a controlled circuit and performs manual/automatic switching of control of the controlled circuit, a setting value sent from the setting circuit is input. A set value input terminal, a preset signal input terminal for inputting a preset signal that provides timing for writing the signal of this set value input terminal into an internal memory configured as a counter, and pulses counted by a counter configured by the internal memory. a presettable counter having a set value change pulse input terminal for inputting the set value, and a set value output terminal for outputting the set value stored in the memory; the set value output terminal and the set value input of the presettable counter; A feedback circuit connected to a terminal via a feedback resistor is provided, and when the controlled circuit is automatically controlled, the set value from the control circuit sent to the set value input terminal is input to the above for each preset signal. The set value is stored in the memory and output to the above set value output terminal, and when the above controlled circuit is manually controlled, the input of the preset signal is cut off, and when the set value stored in the above memory is changed, the above set value is output. Input a pulse from the change pulse input terminal to change the set value and output it to the above set value output terminal, and the output of these set value output terminals is fed back to the above set value input terminal by the above feedback circuit when necessary. A setting circuit characterized by being read by the control circuit.