Frequency synthesizer system and method

摘要

A frequency synthesizing circuit comprising a first mixer configured to receive a first input signal at a first input thereof, a first filter configured to receive an output signal of the first mixer and remove undesired signal frequencies from the output signal of the first mixer, and a feedback loop. The feedback loop includes a second mixer having a first input connected to the output of the first filter and a second input for receiving a second input signal. The second mixer is configured to mix a signal received at the first input with the second input signal. The feedback loop further includes a third mixer having a first input connected to an output of the second mixer and a second input for receiving a third input signal. The third mixer is configured to mix a signal received at the first input with the third input signal.

主权项

1. A frequency synthesizing circuit comprising:
a first mixer configured to receive a first input signal at a first input thereof; a first filter configured to receive an output signal of the first mixer, remove undesired signal frequencies from the output signal of the first mixer, and output a signal of a first filtered frequency; and a feedback loop having an input connected to an output of the first filter, and an output connected to a second input of the first mixer, the feedback loop comprising:
a second mixer having a first input connected to the output of the first filter, and a second input for receiving a second input signal, the second mixer configured to mix the signal of the first filtered frequency received at the first input with the second input signal; anda third mixer having a first input connected to an output of the second mixer, and a second input for receiving a third input signal, the third mixer configured to mix a signal received at the first input with the third input signal.