Method and circuit for operating a mixer
First Claim
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1. A method for operating a mixer configured to mix a local oscillator signal and a received signal, wherein the mixer is tested by modulating the local oscillator signal by means of a modulation signal and injecting the modulated local oscillator signal into the path of the received signal.
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Abstract
A mixer for mixing a received signal and a local oscillator signal is provided. The local oscillator signal is modulated by means of a modulation signal and the modulated local oscillator signal is injected into the received signal.
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Citations
25 Claims
- 1. A method for operating a mixer configured to mix a local oscillator signal and a received signal, wherein the mixer is tested by modulating the local oscillator signal by means of a modulation signal and injecting the modulated local oscillator signal into the path of the received signal.
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10. A circuit arrangement having:
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a mixer configured to mix a received signal and a local oscillator signal, a modulator with a signal input for receiving the local oscillator signal, a modulation input for receiving a modulation signal and an output, and a coupler which is coupled to a path for the received signal and to the output of the modulator such that a signal at the output of the modulator can be injected into the path for the received signal. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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Specification