An improved short channel field effect transistor is provided which includes a semiconductor substrate having a given type dopant with source and drain electrodes, one of the electrodes having a diffusion of the type of dopant opposite to that of the given type dopant, a channel disposed between the source and drain electrodes, a region having the same type dopant as that of the substrate and aligned with the diffusion at the diffusion-channel interface, the region having sufficient dopant to pr...

A power up detection circuit is provided which includes a power supply terminal, an output terminal, an impedance device coupling the output terminal to the power supply terminal and a latch including a first inverter having a first device connected between the output terminal and a point of reference potential and a second device connected between the output terminal and the power supply terminal, the devices are designed so that subthreshold current passing through the first device is greater ...

A system for accessing a memory line coupled to a plurality of aligned memory cells has only a decode circuit and means for applying a drive pulse coupled to one end of the line, the other end of the line is connected to a pulldown circuit which provides a low impedance path to ground unless it is overdriven by the drive pulse. The drive pulse is applied only to a line selected by the decode circuit.

Method and apparatus for electrically measuring the alignment between a first design or element on an object such as a wafer and a second design or element formed by, e. g., a mask superimposed on the object or wafer. The design on the wafer may be at least one resistive point in a resistive area in or on the wafer and the design formed by the mask may be at least one contact point in at least one contact located in one or more apertures of the mask and disposed on the resistive area. The resist...

Restoration of information in a memory of the type requiring periodic restoration to maintain viability of the information is carried out in a manner dependent on the relative need of memory cells in the memory for restoration. This system includes an array of memory cells in which the stored information must be restored periodically to maintain its viability. Means for accessing the memory cells in the array desirably accomplishes a restoration of a memory cell each time it is accessed. Means f...

This package is suitable for both high density, relatively low input or output circuitry, such as memory circuits, and lower density, high input or output circuitry, such as logic circuits. The package has a plurality of substrates in a stack, with the high input or output circuits mounted on the bottom substrate in the stack and the lower input or output circuits mounted in the remaining substrates of the stack. The bottom substrate forms a portion of one wall of the closed container and has a ...

A differential amplifier providing high gain and capable of handling small signals has a common constant current source to which two parallel branches or circuits are connected. Each of the branches includes a controlled current source and an input dependent current source, such as a field effect transistor, coupling the common source to the controlled current source, with a capacitor connected to the common point between the controlled current source and the input dependent current source for p...

An amplifier providing high gain and capable of handling small signals utilizes a controlled current source as the load for an input dependent current source. In one embodiment, a differential amplifier is provided which has a common constant current source to which two parallel branches or circuits are connected. Each of the branches includes a controlled current source and an input dependent current source, such as a field effect transistor, coupling the common current source to the controlled...

Method and apparatus for measuring or determining characteristics, such as width and resistivity of a given conductive line, particularly a conductive line produced by integrated circuit technology. The conductive line, having a first width which is formed on an insulating medium is disposed in the vicinity of or adjacent to a second line having a second width different from the first width, which is also conductive and which is made by the same process by which the given conductive line was mad...

A gated current source providing a fast rise time, minimal delay and improved output current tolerance utilizes a non-linear feedback loop between first and second transistors and an appropriate proportioning of resistances coupled to a collector electrode of one of the transistors. The first transistor has its emitter electrode connected to the base electrode of the second transistor and the collector electrode of the second transistor is coupled to the base electrode of the first transistor th...