| 摘要 |
A phase detector circuit for a phase control loop includes two EXOR circuits and an integrating loop filter which are connected to form one circuit. The two EXOR circuits have common load resistors or current sources. The output signals from the EXOR circuits are integrated through the use of two integrators, which are respectively connected in parallel with the common load resistors or current sources. The voltage across the two integrators provides the output voltage of the loop filter. This eliminates the need for an additional differential amplifier and integrator. The phase detector has a low current consumption and can be produced with a simplified circuit technique.
|
