39 results about "Ones' complement" patented technology

A method and apparatus for calculating a reciprocal of an integer using a modified Newton Raphson method using one's complements instead of two's complements. The method includes determining a required precision; determining a number of iterations T responsive to the required precision; normalizing N into d; obtaining initial approximation of 1 / d=R[0]; refining reciprocal approximation by the modified Newton Raphson operation using ones complements; truncating final iteration result R[T] responsive to the required precision; denormalizing R[T]; and outputting the reciprocal R.

A controller for an adjustable-frequency oscillator includes a first counter supplied with a stop-count value to count adjustable-frequency oscillator cycles divided by the ratio of desired frequency to reference oscillator frequency, to produce a stop signal when the first counter reaches the stop-count value. A second counter counts cycles of a reference oscillator starting from an initial number related to the stop-count value. The second counter stops counting and produces an end-count when the second counter receives the stop signal from the first counter. A resonant tank circuit includes a bank of capacitors with switches to select resonant tank circuit capacitors. The switches are selectively controlled using the end-count in the second counter. The stop-count value is set for the first counter so that the end count number in the second counter using a ones-complement binary format can be used to iteratively set the switches with minimal digital computation.

In a DTV transmitter the bits of shortened BCH codewords that exhibit undesirably low densities of ONEs are ONEs' complemented before being further coded, and used to modulate carrier waves. In a DTV receiver the further coding is decoded after demodulation. The results of such decoding are processed to recover successive shortened BCH codewords, some of which are in TRUE form and others of which have had their bits ONEs' complemented. Each shortened BCH codeword is extended to full length with ZEROs, and decoding is attempted. Successful decoding confirms that the shortened BCH codeword was received in TRUE form. If decoding is unsuccessful, the bits of the shortened BCH codeword as received are ONEs' complemented, extended to full length with ZEROs, and decoding is attempted. Successful decoding confirms that the shortened BCH codeword was received in ONEs' complemented form and has subsequently been converted to TRUE form.

The invention discloses a thermodynamic system of a concurrent heating ultra-high pressure / subcritical backpressure heat supply unit. The thermodynamic system comprises a reheating system, a low pressure reheating system, a high pressure reheating system, a boiler, a turbine and / or a small steam turbine which drives a boiler feeding pump, wherein the low pressure reheating system and the high pressure reheating system are connected with the small steam turbine, the high pressure reheating system is connected with the boiler and the turbine, and the boiler is connected with the turbine and the reheating system; the main steam pressure of the turbine is higher than conventional pressure and reaches up to ultrahigh pressure, subcritical or supercritical grade; the reheating system comprises a re-heater, the exhaust steam or extracted steam of the turbine is supplemented and heated by the boiler gas heat by virtue of a re-heater, and then the turbine is used for heating externally after the temperature of the steam reaches the requirements; the re-heater is made from a tubular product of a conventional boiler economizer. According to the thermodynamic system provided by the invention, the steam power improvement capacity of a backpressure unit can be improved, the generating condition can be greatly improved under the condition of completing a certain heating task, and the economic benefit of a power station can be obviously improved.