| 摘要 |
A dual-mode detector which has phase-detection and phase-and-frequency-detection modes of operation, each mode of operation having the same gain. The detector includes a detection and feedback circuit for detecting phase and frequency differences, and for generating first and second feedback signals for controlling the voltage-controlled oscillator in response to the phase and frequency differences. A mode-switching circuit switches the detection and feedback circuit between the phase-detection and the phase-and-frequency-detection modes of operation. A programmable delay circuit delays signals from the mode-switching circuit and provides delayed signals to the detection and feedback circuit. Finally, an optional edge detection circuit converts predetermined data signals to a format recognizable by the detection and feedback circuit.
|
