| 摘要 |
A monolithically integrated emitter-coupled oscillator circuit. The monolithically integrated emitter-coupled oscillator circuit comprises: (a) switching means for producing at an output port an output signal having a variable oscillation frequency, and the switching means having first and second inputs for receiving a differential control signal and the switching means including first and second terminals for connecting to a capacitor; (b) output port means coupled to the output port of the switching means for outputting the output signal; (c) frequency control means coupled to the first and second terminals of the switching means for adjusting the oscillation frequency of the output signal, wherein the frequency control means comprises first and second current sources, the first current source having means for producing a current at an output coupled to the first and second terminals of the switching means and the second current source having means for producing a current at an output coupled to the control terminal of the switching control means, and the frequency control means including a control input port for electrically connecting an external resistor to the first current source, and the frequency control means includes a resistor monolithically integrated with the emitter-coupled oscillator circuit, and the frequency control means includes a voltage control line coupled to one of the first and second current sources and means responsive to a voltage signal applied to the voltage control line for controlling the operation of the respective first and second current sources; and (d) switching control means for producing a differential control signal at first and second outputs coupled to the first and second inputs respectively of the switching means and switching means being responsive to the differential control signal for producing the output signal, and the switching control means having a control terminal coupled to the frequency control means.
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