| 摘要 |
An oscillator amplifier circuit is provided. The amplifier circuit can be used with a resonator to amplify and form a resonating oscillator. The amplifier circuit comprises an active circuit which includes an inverter and a current-controlled biasing circuit. One transistor of the inverter receives a voltage produced from the biasing circuit in order to place a gate terminal of that transistor at approximately a threshold voltage. The other transistor can be biased using a passive circuit element, such as a resistor. Therefore, both transistors are biased independent of each other within the optimal gain region. Large shunt capacitors are not required and the total current consumption is controlled through a variable resistor coupled to the source terminal of either the first transistor, second transistor, or possibly both transistors of the inverter to adjust the amplitude of the oscillating output.
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