| 摘要 |
PROBLEM TO BE SOLVED: To provide a CV conversion circuit capable of measuring a plurality of capacities by a simple circuit. SOLUTION: This CV conversion circuit including an operation amplifier 1 wherein an inverting input terminal is connected to an output terminal, a resistance 9, a first capacity 2A, a second capacity 2B, a third capacity 3A and a fourth capacity 3B is described as follows: the first capacity 2A is connected to a first signal voltage source 4; an input of an inverter 6 is connected to the first signal voltage source 4, and an output of the inverter 6 is connected to the second capacity 2B; the third capacity 3A is connected to a second signal voltage source 5; an input of an inverter 7 is connected to the second signal voltage source 5, and an output of the inverter 7 is connected to the fourth capacity 3B; and the first signal voltage source 4 and the second signal voltage source 5 generate signal pulses in time sharing, and detect synchronously with the signal pulses. COPYRIGHT: (C)2011,JPO&INPIT
|
