An Analog 0.25 micron BiCMOS Tailbiting MAP Decoder

A fully analog 0.25 micron BiCMOS tailbiting MAP decoder with a coding rate of 1/2 has been fabricated and tested. The measured BER values match the simulated results over the full E sub b/N sub o range of 0 to 7dB. The measured transient impulse response indicates an operating rate of 320Mb/sec while dissipating only 20mW. A digitally equivalent circuit would consume significantly more power, area and delay.