High-Speed Integrated Monolithic Thin-Film Compatible Diode Transistor Logic Circuits

A group of high-speed, low-power monolithic thin-film diode transistor logic (DTL) circuits is described for computer and counter applications. A basic die rather than a master wafer approach was taken since most circuits in the DTL system can be fabricated in terms of the basic single-NAND gate. Propagation delay times of 4.5 nanoseconds for the basic NAND gate have been achieved, with a typical average of 6 nanoseconds at a power level of 11.7 mw. Average set and reset times on RS flip-flops are typically 16 and 18 nanoseconds, respectively. The basic die pattern is such that a fan-in expander, single-NAND gate, dual-NAND gate, RS flip-flop, and a binary element can be made in single-chip form by simple changes in the final interconnection mask. Methods of measurement and applications to counters, adders, and shift registers are discussed.