ABSTRACT
A broad range of circuit architectures is available to meet various amplification requirements. When the requirement of a high dynamic range results in large power consumption and the noise level can be reduced only at the price of a large chip, it is common to adopt a solution based on multiple integrated circuits (IC) and discrete components instead of a monolithic IC. Transceivers should be designed to achieve low power consumption and to feature a high IC density in order to be suitable for portable devices. The exploitation of quadrature conversions in the separation of the signal of interest from image components makes these architectures more suitable for IC implementations than conventional structures requiring a high-quality filter with sharp cutoff characteristics. To provide low-cost devices, radio frequency circuits are realized using packages that are generally designed for low-frequency analog and digital IC.
