Integrated BiCMOS IF-modules for mobile telecommunication applications

Integrated IF-modules for mobile phone applications have been designed with-1.2 um BiCMOS technology. These modules consist of the transmitter, receiver and temperature independent gain-adjustment circuits. The 80 dB dynamic range over 50 MHz bandwidth of both the transmitter and receiver is achieved with the current stearing gain control amplifier. The gain control amplifier has an 80 dB dynamic range which is achieved with the current stearing gain control amplifier. The gain control is linear within +/- 0.5 dB and temperature compensated. The temperature compensation is performed in current mode. The dynamic range requirement is especially challenging for the logarithmic amplifier in the peak detector, in which a current feedback amplifier has been applied. These modules are intended to be combined on a single chip with the realised baseband filtering circuit. The total area of the circuits is 6 mm2 and the power consumption is 60 mA