Patent ID: 8184567

Claim:
A communications device capable of adjusting power consumed thereby and adapted for receiving receive-data from another communications device, said communications device comprising: a receiver including an analog-to-digital converter adapted for receiving the receive-data and converting the receive-data into a digital signal, and a decoding circuit coupled to said analog-to-digital converter for decoding said digital signal; and a control circuit coupled to said receiver for obtaining a signaling index based on said digital signal, said signaling index indicating a communications quality of said receiver, said control circuit determining an operating state of said analog-to-digital converter and said decoding circuit in accordance with said signaling index and a receiving index; wherein in response to said control circuit determining that said signaling index conforms with a reference range, said control circuit reduces a reference signal so as to reduce linearity of said analog-to-digital converter in accordance with said receiving index, and reduces a decoding capability of said decoding circuit in accordance with said receiving index.