A very low noise audio output amplifier circuit features power supply bypass capacitors comprising an electrolytic capacitor in parallel with nonpolar capacitors from the group consisting of metallized paper (MP), polyethylene terephthalate (MYLAR), and polystyrene film capacitors.

A counter and a memory device are included each of which includes n binary memory units. A coincident signal is outputted when the output data are coincident between the counter and the memory device. Each binary memory unit produces a binary output signal ("1" or "0") and its negated binary output signal ("1" or "0"). An exclusive OR circuit connected between the first stage memory units of the counter and the memory device. Between the corresponding memory units of the remaining each stage, an...

A laser driven computer output microfilmer is operable in an optical registration and focus monitoring mode at a higher than normal (recording) frame repetition rate, to thereby avoid flickering in the eyes of the observer. Such increased repetition rate is implemented by selectively feeding a preprogrammed, abbreviated test pattern to the system input, and the test pattern signal also contains instructions for controlling the vertical scan or deflection mirror in a multi-stepped manner such tha...

An electrosurgical unit which provides a voltage output to a load. An oscator in the unit produces the output of a given frequency. A switching circuit coupled to the oscillator provides an unmodulated RF carrier from the oscillator for use in cutting procedures and a pulse modulated RF voltage from the oscillator for use in coagulation procedures. A feedback circuit is coupled from the output to the input of the oscillator to maintain the output voltage level from the unit at a substantially co...

A circuit for correcting an AC output signal from an electronic device into closer correspondence with an AC input signal to the combination of the circuit and device comprises first and second amplifiers arranged to each receive the input signal. The first amplifier is also arranged to receive feedback of the output signal from the electronic device for providing a signal which is a function of the difference between the input and output signals. The combination of signals from the first and se...

A centrifugal pump includes a housing containing an impeller mounted on a shaft which is journaled for rotation within the housing. An inlet to the housing directs fluid from a supply to one end of the impeller and axially spaced first and second volute diffusers formed around the other end of the impeller receive fluid from the impeller. The volute diffusers are of different predetermined sizes designed to handle different flowrates of fluid while producing about the same pressure head. A sleev...

A high output extruder screw which produces high throughputs and increased melting efficiency. The screw has a feed, transition and a meter section. The transition section includes a series of alternating compression and relief zones. Each compression zone has a decreasing channel depth and each relief zone has an increasing channel depth. This promotes rapid melting of the polymer while maintaining low extrudate temperatures and allows higher screw speeds to increase throughput.

An analog output circuit for a digital correlator that may be completely integrated with the digital correlator on a single CMOS/LSI chip. The output circuit includes a compensating arrangement so that its output voltage is substantially unaffected by internal processing variables between different chips or by external variables such as temperature or supply voltages. The circuit includes a reference MOS unit and a correlation MOS unit each including parallel arranged PMOS transistors respective...

The present invention relates to variable output transmissions which utilize mechanical square wave generators. The square wave generator comprises a plurality of relatively rotatable driver gears mounted on a first common shaft, and a plurality of driven gears mounted to the bevel gears of a differential, the differential carrier and pinion thereof being fixedly mounted on a second common shaft. The driven and driver gear meshingly engage, the rotation of the driver gears imparting a relative p...

A buffered serial to parallel memory system uses an output driver which is semi-independently operated by separate control logic. Following conventional serial data input to a first buffer, the separate control logic responds to a predetermined signal to independently clear a second buffer, transfer the data from the first buffer to the second buffer and then clear the first buffer for further data input. The stored data in the second buffer is then used for output devices requiring parallel dat...