Low Noise Amplifier for Multiple Channels

摘要

An amplifier system has an amplifier for amplifying a plurality of input signals from a plurality of different channels, and a plurality of demodulators each operatively coupled with the amplifier for receiving amplified input signals from the amplifier. Each demodulator is configured to demodulate a single amplified input channel signal from a single channel of the plurality of different channels. The system thus also has a plurality of filters, coupled with each of the demodulators, for mitigating the noise.

主权项

1. A signal transmission system comprising:
an amplifier configured to amplify an input signal having a plurality of different channels to produce an amplified input signal having the plurality of different channels; a demodulator configured to demodulate the amplified input signal to produce at least one demodulated signal for each channel, demodulating causing each demodulated signal to have noise relating to at least one other channel, the demodulator comprising:
a first-channel demodulator comprising a switching arrangement controlled by a first-channel drive signal to produce a first baseband signal; anda second-channel demodulator comprising a switching arrangement controlled by a second-channel drive signal to produce a second baseband signal;a first filter in communication with the first-channel demodulator and configured to mitigate the noise on the first baseband signal;a second filter in communication with the second-channel demodulator and configured to mitigate the noise on the second baseband signal; a first output coupled to the first filter and configured to transmit a filtered version of the first baseband signal; and a second output coupled to the second filter and configured to transmit a filtered version of the second baseband signal.