| 摘要 |
A noise-immune digital phase detector comprises a counting pulse generator, a first “AND” circuit, an electronic commutator, a counting pulse frequency halver, a pulse counter, a signal pulse shaper, a reference pulse shaper. In addition, it comprises series connected to the signal pulse shaper: a diode, a delay circuit, a second “AND” circuit and a first flip-flop connected to the first “AND” circuit; and in series connected to the reference pulse shaper: a blocking generator, the third “AND” circuit, the second flip-flop connected to the second “AND” circuit. |
