Pierre Mollier

A 20 K CMOS array with 200-ps gate delay

A 20 K NAND2 equivalent CMOS gate array prototype with 0.5- mu m channel length FETs is described. The 7.5*7.5-mm chip is designed for high performance with 200-ps gate delay. Large macros such as a 32-b RISC (reduced instruction-set computer) processor and 128*8 SRAM (static random-access memory) have been implemented with automatic placement and wiring tools. Their respective predicted performances of 17-ns cycle and 6.1-ns access time have been verified. This confirms that the speed of complex functions in half-micrometer-channel-length CMOS technology is getting close to the speed achieved by current bipolar hardware. >

Multiemitter BiCMOS logic circuit family

It has been demonstrated that, in a 64-b carry look-ahead adder, the use of conventional half-micron BiCMOS circuits under a 3.6-V power supply gives 40% faster delay than the CMOS design. Up to 85% improvement is obtained with the new multiemitter BiCMOS circuit. A complete logic circuit family with the multiemitter concept is described, showing a maximum benefit on gates with a high number of inputs