The concept of ultra wideband impulse radio has interesting properties.The wide transmission band makes penetration through different materials better than narrow band transmission. The lack of carrier maybe traded for low power solutions provided a power efficient receivermay be implemented. Unlike narrow band radio, demanding statisticalcomputation must be carried out. This is often done in a parallel architecture. Although several portable applications are striving for higherbandwidth, there is an increasing demand for shortrange low bandwidthmobile communication units. In several of these applications ultra lowpower is important. In addition other properties of impulse radio transmissions may be appreciated such as interference immunity and penetration.The purpose of this thesis is to explore a lowpower solution for correlatorbased impulse radio receivers. A mixedmode parallel RAKE structure isrealized in a standard 0.12 m CMOS technology. The receiver is implemented as a RAKE structure combining digital shift registers with analogcomputation in a series of parallel taps of a synchronizing delay line. Ineach parallel bit stream the incoming signal is crosscorrelated with astored template. By combining a delay line and a mixedmode correlator we can explore multipath reflections in a time domain statisticalcomputation for symbol recovery. Simulations are presented showingpromising results with regard to power consumption and overall functionality. Measurements are performed conforming the basic functionality of the circuit.