| 摘要 |
The present invention relates to a circuit for processing a signal and comprising an amplifier ( 20 ) having an input and an output. The circuit further comprises a first switching arrangement (S 3 , T 3 ) and a second switching arrangement (S 2 , T 2 ). The first switching arrangement being arranged between said input and ground and said second switching arrangement being arranged between said output and ground. The switching arrangements are operatively arranged to connect said input and output to said ground so that said amplifier attenuates said signal.
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