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Controllable frequency divider circuit, transmitter/receiver with a controllable frequency divider circuit, and a method for carrying out a loop-back test
Controllable frequency divider circuit, transmitter/receiver with a controllable frequency divider circuit, and a method for carrying out a loop-back test
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机译:可控分频器电路,具有可控分频器电路的发送器/接收器以及进行环回测试的方法
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摘要
A frequency divider circuit can be utilized for loop-back tests in a transmitter/receiver. In one embodiment, provision is made for a multiplexer to be connected downstream from a frequency divider, whose output side produces signal elements with different phases. The multiplexer is designed to periodically switch its inputs to its output by means of a control signal at its control input. The periodicity of the switching results in a frequency offset with respect to an unswitched signal, by which means a test signal is produced with a difference frequency during frequency conversion. Other systems and methods are also disclosed.
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