A memory device is presented having the option, using simple means, of using one basic chip for different pin-outs or chip configurations. The metal and pin-out option implementation are formed by: 1) a dual-function pad and associated circuitry with an option for either an Input/Output or an Input-only configuration and 2) rotation of the chip with respect to the orientation of the DIP (dual in-line package). The implementation of this invention has decreased area requirements and better perfor…

A power supply for high voltage, low current gas discharge tubes such as neon, argon, and mercury vapor. A free running, flyback oscillator, converts D.C. voltage energy into radio frequency energy by means of a compact, ferrite transformer and associated circuitry. The primary winding is tuned by a resonant capacitor and driven by a power transistor. A high voltage, centertapped winding of a ferrite transformer drives the gas tube load directly. A feedback winding arranged across the transistor…

An associative memory comprises a CAM array which is divided into a plurality of blocks, block select means, decoder means, and output means. The associative memory receives an externally supplied input address having first, second, and third parts. Which entry row in the CAM should be compared with the first part (TAG address) of the input address is determined by the second and third parts of the input address. The block select means responsive to the second part of the input address selects a…

A circuit and method for minimizing write recovery time in a Bi-CMOS SRAM by equalizing the bit-line voltages during a read access. A P-channel device whose drain, source and gate are connected to bit, bit-bar, and the write control signal, respectively, indirectly equalizes the bit-lines by equalizing the base voltages of the NPN bit-line load devices only when the column is selected for read access. This technique takes advantage of the current gain of the NPN transistor from the base to the e…

A microwave frequency group delay corrector operates by reflecting the microwave on a correcting complex impedance (jx). It makes use of a power divider (13), of the Wilkinson type. The complex impedance (20) is connected to the port (14) which is normally the inlet port to the power divider (13). The microwave (E) is applied to one of the other two ports (15), and the remaining other port (16) is used as the port from which the phase corrected outlet microwave (S) is taken.

There is disclosed a laser driving device capable of providing a stable laser emission regardless of the ambient temperature, by supplying a laser element with a first current and a second bias current with a controlled ratio therebetween.

A combined glare and heat shield configuration is disclosed for vehicle headlamp applications. Such composite heat shield member is configured and located inside the headlamp assembly with particular respect to the light source so as to avoid shadowing by this lamp component in the projected light beam pattern. Efficacy of the hermetically sealed electric lamp providing a light source in the present vehicle headlamp construction can be further improved with an infrared reflective coating being d…

A fluorescent lamp dimmer, for use with one or more fluorescent lamps where large ratios of luminous differences are required, which includes apparatus for powering the arc current for the fluorescent lamps from a source of pulsating voltage of variable pulse width and variable frequency both of which can be changed by relatively small amounts and still produce very large changes (15,000:1) in luminescence.

A brilliance control circuit capable of automatically controlling the brilliance of fluorescent display tubes, comprising a lighting voltage regulating circuit incorporating a circuit element which decreases the lighting voltage when the current flowing through the fluorescent display tube increases, and increases the lighting voltage when the current decreases.

An LC filter comprises a ceramic laminate which has at least one dielectric part defining an exposed surface and at least one magnetic part integrated with the dielectric part in a layered manner. The ceramic laminate is provided with at least one through hole which has a first opening positioned on the exposed surface of the dielectric part and commonly passes through both of the dielectric part and the magnetic part. A connector pin is inserted in the through hole while a first electrode of a …