公开(公告)号：JPS5187947A

公开(公告)日：1976-07-31

申请号：JP1192875

申请日：1975-01-30

Applicant: TOA ELECTRONICS

Inventor： SHIMADA KOICHI ,  AMAMOTO HIDEKI

IPC: H03K4/02 ,  H03K5/00 ,  H03L7/00

公开(公告)号：JPS61228586A

公开(公告)日：1986-10-11

申请号：JP6965385

申请日：1985-04-01

Applicant: TOA ELECTRONICS

Inventor： AMAMOTO HIDEKI

IPC: G01P3/489 ,  G01D5/245 ,  G05B1/01 ,  G06M1/28

Abstract: PURPOSE:To set the numerical value to a counter easily and quickly through simple constitution by supplying control pulses to plural count stages in response to the revolving speed of a rotor. CONSTITUTION:When a rotor pulse generator 11 is rotated, the control pulses P are supplied to a setting count stage 131 for low-order digits, a revolving speed detecting means 16 and a pulse generator 17 respectively from the means 11. The generator 17 sends a control pulse having the same frequency as that of the pulse P to an OR circuit 18 based on the permission signal given from the means 16 when the revolving speed of the means 11 exceeds a prescribed level. Then the control pulse is sent to a setting count stage 132 for high-order digits from the circuit 18 without waiting for a carry signal 131C sent from the stage 131. Thus it is possible to set quickly the numerical value to each count stage.

公开(公告)号：JPS607218A

公开(公告)日：1985-01-16

申请号：JP11448983

申请日：1983-06-24

Applicant: TOA ELECTRONICS

Inventor： AMAMOTO HIDEKI

IPC: H03H11/12

Abstract: PURPOSE:To keep the circuit sensitivity Q to a constant value even if the gain is changed by activating an operational amplifier as a non-inverting amplifier and feeding back its inverting input signal to a CR circuit network via a buffer amplifier of unity gain conducting impedance conversion. CONSTITUTION:An input terminal 11 is connected to a non-inverting input of the operational amplifier 19 through a CR circuit network 12, an output of the operational amplifier 19 is connected to an output terminal 14 and also grounded through a voltage dividing element 25, and the output of the voltage dividing element 25, i.e., a connecting point of resistors 23, 24 is connected to an inverting input of the operational amplifier 19 as feedback. Then, the output of the voltage dividing point is connected to the CR circuit network 12 through a buffer amplifier 26 of the unity gain to be connected to the non-inverting input of the operational amplifier 19 as positive feedback. Since no signal appears between the inverting input and the non-inverting input of the operational amplifier 19, a signal having the same amplitude of the signal voltage between the non-inverting input and ground is generated between the inverting input and ground. That is, the circuit sensitivity Q is kept constant even if the gain is changed.