7,443 research outputs found
Push clocks: a new approach to charge-coupled devices clocking
A new approach to charge-coupled device clocking has been developed—dynamic push clocks. With dynamic push clocks, the charge is transferred by pushing it from one storage site to another. The push clock approach results in a larger signal dynamic range, larger signal-to-noise ratio, and better performance at both high and low frequencies
Schottky Barrier Gate Field Effect Transistor
An obvious addition to the ever-growing family of field-effect devices is a field-effect transistor with a Schottky barrier gate. It is the purpose of this correspondence 1) to demonstrate that indeed such a device does function as expected and 2) to point out several advantages of such a structure under certain circumstances. A schematic cross section of the device is shown in Fig. 1. The gate consists of a metal in intimate contact with the clean semiconductor surface. Clearly the ohmic contacts can be placed either on top of or under the semiconductor layer
Physics of Interfaces
It has long been known that when a metal is placed in contact with a semiconductor a rectifying contact often results. This rectification is a result
of an energy barrier between the metal and the semiconductor. In order to form a nonrectifying or ohmic contact, two general approaches can be applied: either (1) the barrier energy can be reduced to a low
enough value that the thermally excited current over the barrier is large enough for the application involved or (2) the semiconductor can be doped to a high carrier density to allow quantum mechanical tunneling to take
place. The physical principles of these processes are discussed in this article
Relativity and the Scientific Method
The recent PROCEEDINGS article by J. R. Pierce has triggered considerable adverse comment on Einstein's Theory of Relativity. In the maze of detail which was discussed, one very important principle was all but forgotten, i.e., the operation of the scientific method
Pulse Characteristic Display for Tunnel Emission Devices
Recent studies on tunnel emission devices have
demonstrated that destruction normally occurs because
of high temperature generated within the thin film
structure while their electrical characteristics are being
measured. This difficulty has been overcome to a large
degree by pulse tests performed with the unit described
here. The most useful data to be observed on devices
designed to emit electrons into a vacuum are: (a) the voltampere characteristic of the diode (metal-insulator-metal structure), and (b) the transfer characteristic (i.e., emitted current vs diode current)
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