OPTIMIZED DATA CONVERTER DESIGN USING MIXED SEMICONDUCTOR TECHNOLOGY FOR CELLULAR COMMUNICATIONS

摘要

A cellular radio architecture for a vehicle that includes a receiver module having a receiver delta-sigma modulator that converts analog receive signals to a representative digital signal. The architecture further includes a transmitter module having a transmitter delta-sigma modulator for converting digital data bits to analog transmit signals. Portions of the receiver and transmitter modules are fabricated with indium phosphide (InP) technologies and portions of the receiver and transmitter modules are fabricated with CMOS technologies.

主权项

1. A transceiver front-end circuit for a cellular radio, said transceiver circuit comprising:
an antenna structure operable to transmit signals and receive signals; a multiplexer coupled to the antenna structure and including multiple signal paths, each signal path including a bandpass filter that passes a different frequency band than the other bandpass filters and a circulator that provides signal isolation between the transmit signals and the receive signals; a receiver module including a separate signal channel for each of the signal paths in the multiplexer, each signal channel in the receiver module including a receiver delta-sigma modulator that converts analog receive signals to a representative digital signal, wherein portions of receiver module are fabricated with indium phosphide (InP) technologies and portions of the receiver module are fabricated with CMOS technologies; and a transmitter module including a transmitter delta-sigma modulator for converting digital data bits to the transmit signals, said transmitter module including a power amplifier and a switch for directing the transmit signals to one of the signal paths in the multiplexer, wherein portions of transmitter module are fabricated with InP technologies and portions of the transmitter module are fabricated with CMOS technologies.