Oscillator circuit

Oscillator circuit

  • CN 101,273,523 B
  • Filed: 09/27/2005
  • Issued: 04/22/2015
  • Est. Priority Date: 09/27/2005
  • Status: Active Grant
First Claim
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1. comprise the pierce circuit of resonant element, active element and feedback control loop, described active element is MOS transistor T1 and T2,It is characterized in that:

  • Comprise the additional feedback loop of phase-shifting element,Wherein said resonant element is connected to the drain electrode of described active element, and the grid of T1 is connected by described feedback control loop one end of resonant element with the drain electrode being connected T2, and described additional feedback loop is connected between the drain and gate of described active elementWherein, described additional feedback loop comprises inverter network, described inverter network comprises feedback transistor T5 and T6, N-channel transistor T7 and T8 and feedback element, T7 and T8 at source ground and is respectively connected to the grid of T1 and T2 and the drain electrode of T5 and T6 via drain electrode.2. pierce circuit as claimed in claim 1, wherein said pierce circuit also comprises;

    -two resonant elements, it has from the first common terminal of service voltage feed and the second terminal of drain electrode being connected to described MOS transistor T1 and T2.3. pierce circuit as claimed in claim 2, the source electrode of wherein said transistor one of in the following manner ground connection;

    directly ground connection, by bias current source ground connection, via obstruction element or current feedback circuit ground connection.4. pierce circuit as claimed in claim 2, comprise bias network, described bias network is connected to the grid of described MOS transistor T1 and T2.5. pierce circuit as claimed in claim 1, wherein resonant element comprises one or more lc circuit.6. pierce circuit as claimed in claim 2, wherein feedback element comprises capacitor or transformer.7. pierce circuit, wherein bias voltage (V as claimed in claim 1 bias) be applied to the source electrode of described feedback transistor T5 and T6. 8. pierce circuit as claimed in claim 1, wherein feedback control loop comprises feedback element, and described feedback element comprises capacitor or transformer.9. comprise the circuit according to the oscillator in claim 1-8 described in any one.10. the method for providing fast switching characteristics and current impulse to optimize to oscillator, said method comprising the steps of;

    -arrange pierce circuit (200a, 200b, 300,400) with resonant element, active element and feedback control loop, described active element is MOS transistor T1 and T2, and-additional feedback loop comprising phase-shifting element is provided to described circuit,Wherein said resonant element is connected to the drain electrode of described active element, and the grid of T1 is connected by described feedback control loop one end of resonant element with the drain electrode being connected T2, and described additional feedback loop is connected between the drain and gate of described active elementWherein, described additional feedback loop comprises inverter network, described inverter network comprises feedback transistor T5 and T6, N-channel transistor T7 and T8 and feedback element, T7 and T8 at source ground and is respectively connected to the grid of T1 and T2 and the drain electrode of T5 and T6 via drain electrode.

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