Nec Electronics Corporation

Tomonari Aoki

Kazuhiro Nakajima

A universal logic module of a programmable semiconductor device is constructed by first, second, third, fourth and fifth terminals, a first transfer gate connected between the first and fourth terminals, a second transfer gate connected between the second and fourth terminals, and an inverter connected between the third and fifth terminals. The first and second transfer gates are controlled by voltages at the third and fifth terminals, so that one of the first and second transfer gates is turned ON and the other of the first and second transfer gates is turned OFF.

Programmable semiconductor device including universal logic modules coping with as many user inverters

A phase comparator is disclosed that can provide a phase comparison result at high speed that essentially does not vary according a power source voltage, ambient temperature and/or manufacturing process conditions, or the like. A phase comparator ( ) may include one-shot pulse generating units ( and ) that output one-shot pulses according to input data signal DAT and clock signal CLK, respectively. An R-S flip-flop ( ) can receive one-shot pulses from one-shot pulse generating units ( and ) at set and reset inputs, respectively. An output flip-flop ( ) can select between an output signal of R-S flip-flop ( ) and a delay signal &ldquo;a8&rdquo; generated from input data signal DAT, and latch such a result according to a delayed clocks signal CLK.

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Kanagawa, Japan

Tomonari Aoki