Radio architecture

An integrated circuit for use in a digital radio transceiver, the integrated circuit including analog devices including MOS transistors at least some of which have high threshold voltages, and digital devices including MOS transistors at least some of which have reduced threshold voltages.

A digital radio transceiver, comprising analog RF receiver and transmitter components and an analog-digital converter and a digital-analog converter, each including MOS transistors, wherein the analog RF receiver and transmitter components and the analog-digital converter and the digital-analog converter form part of the's-same integrated circuit, and wherein the MOS transistors in the analog-digital converter and digital-analog converter have high threshold voltages and at least some of the MOS transistors in the analog components have low threshold voltages.

A digital radio transceiver, comprising analog devices and digital devices each including MOS transistors, wherein the MOS transistors in the digital devices have high threshold voltages and at least some of the MOS transistors in the analog devices have lower threshold voltages.

A digital radio transceiver, comprising analog components and digital components each including MOS transistors, wherein the MOS transistors in the digital components have higher threshold voltages than at least some of the MOS transistors in the analog components.

A digital radio transceiver, comprising analog RF receiver and transmitter components and an analog-digital converter and a digital-analog converter, each including MOS transistors, wherein the MOS transistors in the analog-digital converter and digital-analog converter have high threshold voltages and the MOS transistors in the analog components have low threshold voltages.

A method of manufacturing a digital radio transceiver integrated circuit, comprising analog components and digital components each including MOS transistors, comprising altering the threshold implantation doses such that the MOS transistors in the digital components have high threshold voltages and at least some of the MOS transistors in the analog components have lower threshold voltages.

A radio receiver amplifier circuit comprising a pair of common gate MOSFET transistors, and a pair of input MOSFET transistors, to which the input signal is applied, the input transistors being connected to the supply voltage and ground, and the common gate transistors being cascoded between the input transistors, wherein the common gate transistors have reduced threshold voltages.

A radio frequency mixer circuit comprising a pair of transmission gates, each comprising a pair of MOSFET transistors, respective local oscillator signals being supplied to the gates of the transistors, and an input signal being supplied to the inputs of the transmission gates, wherein the transistors of the transmission gates have reduced thresholds.