| 摘要 |
A driving and stabilizing circuit for a single coil electro-mechanical oscillator especially for the rate regulator of a time-piece. The single oscillator drive coil is connected between the terminals of a d.c. supply voltage in series relation to the collector-emitter electrodes of an operating transistor which is operatively switched between a conductive and nonconductive condition by a control transistor. A storage capacitor preceding the control input terminal of the control transistor is operatively connected to be loaded by a regulating circuit responding to voltage induced in the coil. The regulating circuit includes a regulating transistor having a base electrode connected to receive a bias voltage from a voltage divider between the terminals of the supply voltage, and having an emitter electrode operatively connected to the coil. The regulating circuit is also provided with an additional regulating means having a control input operatively connected to the coil and having a controlled output connected to the storage capacitor, the regulating transistor and the regulating means thereby responding variably to voltage conditions occurring in the circuit and tending to stabilize the oscillations of the oscillator in amplitude and frequency. In one embodiment, the additional regulating means comprises a further regulating transistor having a base electrode connected to the coil by way of a series dropping resistor and having collector-emitter electrodes connected in series relation to the storage capacitor between the terminals of the supply. In another embodiment, the additional regulating means comprises a further regulating transistor having a base electrode connected to the coil by way of an RC biasing circuit and being connected to cut off the control transistor in the conductive state of the further regulating transistor.
|
