| 摘要 |
PURPOSE:To eliminate drift of an offset voltage by forcibly turning the output voltage of an amplifier to a reference voltage in a cyclic manner. CONSTITUTION:When a positive voltage is outputted to an output terminal 12 of an amplifier 11 by a voltage at a terminal 7 of a bridge circuit, a voltage almost equal to that at the output terminal 12 is outputted to a terminal 17 with an emitter follower circuit 13 of a transistor. As a time, electronic switch 14 at Ta is ON, the voltage at the terminal 7 is raised while the voltage at an output terminal 10 of an amplifier 9 lowered so that the voltage at the output terminal 10 is maintained zero constantly. Then, the time, electronic switch 14 at Tb is turned OFF. As contacting a heat wires 1a and 1b unevenly due to an angular velocity, an inert gas cools heat wires 1a and 1b and a voltage nullifying the offset voltage is outputted to the terminal 10 in proportion to actual angular velocity. |
