| 摘要 |
PURPOSE:To prevent the effect due to difference of inidividuality and temperature fluctuation by constituting a transistor circuit in which a bias voltage impressed to an Avalanche diode is expressed by a specific equation and providing a negative characteristic to temperature to a resistor. CONSTITUTION:A control signal Vc is applied to a positive input of an operational amplifier A and a feedback signal is inputted to a negative input respectively. A resistance circuit comprising R1, R2 and R3 is connected to an outut of the amplifier A and a potential at a connecting point between the resistors R1 and R2 is fed back to the negative input of the amplifier A. When 1<<R1/ (R2+R3) is established, an output VB is given by an equation (where; Vc is a control signal). In using a negative resistance element as the resistor R2, the temperature characteristic of (1+alphat) is given to the output VB, allowing to avoid the effect due to temperature fluctuation. |
