Potential of bipolar complementary device/Circuit technology

Bipolar complementary transistor logic circuits have been very little explored. The main reason certainly is that the bipolar transistor as a current controlled device is not as suited for such circuit applications as the voltage controlled MOSFET. After briefly explaining the major obstacles for CMOS-like bipolar complementary circuits and deriving the stringent device/technology prerequisites for any practical realisation, the recently proposed Charge Buffered Logic as a unique bipolar complementary circuit concept is described. Its potential for high speed at microwatt DC power, the key device parameters, and critical design aspects are discussed.