| 摘要 |
A voltage controlled oscillator is provided comprising a plurality of delay elements serially connected to form a ring and each element within the plurality of elements includes an input and output. The voltage controlled oscillator also includes a set of control elements where each control element within the set of control elements has an input connected to an input of a delay element within the set of delay elements and an output connected to an output of a different delay element within the plurality of delay elements. A control voltage is selectively applied to control elements within the set of control elements to vary the oscillating frequency and phase distribution in proportion to the control voltage. In addition, the voltage controlled oscillator includes a selection unit connected to the set of control elements. The selection unit selectively enables, disables, and regulates groups of control elements to alter the gain and the range of frequency adjustment attainable by the control voltage or the voltage controlled oscillator.
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