Patent ID: 7697899
Filing Date: 2010-04-13
Classification: H04B,H04R

Abstract:
1. A radio frequency integrated circuit (RFIC) comprises: a transmit acoustic transducer circuit coupled to convert transmit sound waves into transmit electrical signals; a down-conversion module coupled to convert received radio frequency (RF) signals into down-converted signals; a digital conversion module coupled to convert the transmit electrical signals into digital transmit audio signals for transmitting and to convert the down-converted signals into digital receive baseband or low intermediate frequency (IF) signals for receiving, the digital conversion module including a combining module coupled to combine the transmit electrical signals with the down-converted signals to produce combined signals, an analog to digital conversion module coupled to convert the combined signals into digital combined signals, and a separation module coupled to separate the digital combined signals into the digital transmit audio signals and digital receive baseband or low IF signals; a transmit baseband processing module coupled to convert the digital transmit audio signals into digital transmit baseband or low IF signals; a receive baseband processing module coupled to convert the digital receive baseband or low IF signals into digital receive audio signals; an analog conversion module coupled to convert the digital transmit baseband or low IF signals into analog transmit baseband or low IF signals for transmitting and to convert the digital receive audio signals into receive electrical signals for receiving; an up-conversion module coupled to convert the analog transmit baseband or low IF signals into up-converted signals; a power amplifier circuit coupled to amplify the up-converted signals to produce transmit RF signals; and a receive acoustic transducer circuit coupled to convert the receive electrical signals into receive sound waves.