Phuc C. Pham

A low power differential bus utilizing novel split level bus technique

A low-power differential bus utilizing a novel split level bus (SLB) technique is described. There are several inherent advantages with the SLB. The bus operates at full differential mode at all times so the receiver never detects an indeterminate state. There are no reference levels on the bus, allowing full common mode range. Making D and DB both passive or active at the same time can make the SLB appear similar to single-ended operation. This makes any present single-ended bus technique, such as future-bus arbitration, directly applicable to the SLB. The reduced power dissipated by the internal circuitry, and reduction in power supply pins, allow wider parts in the same package. The losses on the bus are reduced and the bus power remains constant for any number of drivers.<<ETX>>

The architecture, logic, and circuit design of a bipolar, 200 Mbyte/sec, serializing data mover IC, with 32-bit TTL-compatible parallel I/O and unique 1.8 Gbit/sec 'cutoff driver' differential PECL serial I/O

This paper discusses the architecture, logic design, and circuit design of the Autobahn Spanceiver-a serializing transceiver IC that facilitates movement of arbitrarily large blocks of 32-bit parallel TTL data at data rates up to 200 MBytes/sec, between two or more nodes on a shared, controlled-impedance, half-duplex, 1.8 Gbit/sec, differential-PECL serial channel.

A low power bipolar ECL standard cell library utilizing a novel design methodology and complementary bipolar driver

A low-power bipolar ECL (emitter-coupled-logic) standard cell library built with a design methodology which simplifies the layout of primitive cells by utilizing a subprimitive cell layout as a building block is discussed. The library utilizes complementary bipolar (CBIP) drivers for high drive capability without an accompanying increase in power dissipation. The method provides maximum flexibility in driver selection while minimizing cell library overhead. Analysis of the performance of the CBIP drivers using MSPICE simulations show superior drive capability over emitter follower drivers for load capacitances greater than 0.2 pF.<<ETX>>