摘要:
Conversion is achieved by subdividing the intergrate and deintegrate periods into a plurality of integrate and deintegrate phases. Power frequency rejection can be maintained by defining the combined integrate phases to integrate over at least one complete power line cycle. Sychronization of the integrate phases with the power line cycle is maintained by separating integrate phases with a combined deintegrate and rest phase of fixed duration.
摘要:
The invention performs the multiplication and/or accumulation of digital numbers in either two's complement or unsigned magnitude representation. A modified Booth algorithm minimizes the number of partial products generated. Two adder arrays sum the partial products in parallel to generate intermediate values which are then summed by a third adder array. The partial products are divided between the two adder arrays in a manner which optimizes the speed of the circuit.
摘要:
Disclosed is a programmable logic gate array employing a plurality of reprogrammable fuses (20) having a logical NAND characteristic for logically connecting selected inputs (A o -A n ) to selected logic gates (22). Means E 5 , P s are also disclosed for programming said fuses and for providing appropriate signals to allow three modes of operation of the logic gate array; programming, erasure and normal logic operation.
摘要:
The duration of time during which an AC power vottage sinusoidal waveform remains between negative voltage threshold -V1 volts, nominally 5% of negative peak voltage -V2 volts, and positive voltage threshold +V1 volts, nominally 5% of peak positive voltage +V2 volts, is detected. By the change in voltage with time exhibited by a sinusoidal waveform In the region of zero voltage crossing, the expected time duration between voltage thresholds is approximately 6% of one-half period of such sinusoidal waveform. If the actual time between voltage thresholds exceeds (nominally) twice this value, or 10% of one-half period, then a power black-out condition is sensed, and a power fault signal is produced.
摘要:
The invention performs the multiplication and/or accumulation of digital numbers in either two's complement or unsigned magnitude representation. A modified Booth algorithm minimizes the number of partial products generated. Two adder arrays sum the partial products in parallel to generate intermediate values which are then summed by a third adder array. The partial products are divided between the two adder arrays in a manner which optimizes the speed of the circuit.
摘要:
The duration of time during which an AC power vottage sinusoidal waveform remains between negative voltage threshold -V1 volts, nominally 5% of negative peak voltage -V2 volts, and positive voltage threshold +V1 volts, nominally 5% of peak positive voltage +V2 volts, is detected. By the change in voltage with time exhibited by a sinusoidal waveform In the region of zero voltage crossing, the expected time duration between voltage thresholds is approximately 6% of one-half period of such sinusoidal waveform. If the actual time between voltage thresholds exceeds (nominally) twice this value, or 10% of one-half period, then a power black-out condition is sensed, and a power fault signal is produced.
摘要:
A parallel EXCLUSIVE OR and EXCLUSIVE NOR gate comprises four groups of three transistors. In each group of transistors, one (60,62,66,70) is part of the EXCLUSIVE NOR gate only, one (74,76,78,80) is part of the EXCLUSIVE OR gate only, and one (56,58,64,68) is a part of both gates. The gates may be constructed in a manner similar to a known circuit using tri-inverters, but since one transistor in every group of three has a dual membership of both gates, the total circuit requires 12 transistors instead of 16.
摘要:
A parallel EXCLUSIVE OR and EXCLUSIVE NOR gate comprises four groups of three transistors. In each group of transistors, one (60,62,66,70) is part of the EXCLUSIVE NOR gate only, one (74,76,78,80) is part of the EXCLUSIVE OR gate only, and one (56,58,64,68) is a part of both gates. The gates may be constructed in a manner similar to a known circuit using tri-inverters, but since one transistor in every group of three has a dual membership of both gates, the total circuit requires 12 transistors instead of 16.