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The microcode had a primarily vertical style with 32-bit microinstructions. [34] The instructions were stored on replaceable program boards with a grid of bit positions. One (1) bits were represented by small metal squares that were sensed by amplifiers, zero (0) bits by the absence of the squares. [35]
The use of a cascode (sometimes verbified to cascoding) is a common technique for improving analog circuit performance, applicable to both vacuum tubes and transistors.The name "cascode" was coined in an article written by Frederick Vinton Hunt and Roger Wayne Hickman in 1939, in a discussion on the application of voltage stabilizers. [3]
The CAB 500 featured a novel micro-programmed architecture which used transistors and magnetic amplifiers for its logic called symmags, developed by SEA. It also ran an interactive high-level language for real-time calculations, one of the first of its kind, and an incremental compiler for a programming language known as PAF, which bore ...
A transconductance amplifier (g m amplifier) puts out a current proportional to its input voltage. In network analysis, the transconductance amplifier is defined as a voltage controlled current source (VCCS). These amplifiers are commonly seen installed in a cascode configuration, which improves the frequency response.
Among his inventions is the quasi-complementary (transistor) amplifier circuit, [4] which has been used in many commercial audio amplifiers. Another of his inventions is the lateral transistor which is used in linear integrated circuits and TTL digital integrated circuits. He also invented the wireless microphone.
In 1967, Fairchild Semiconductor introduced the Micromatrix family of bipolar diode–transistor logic (DTL) and transistor–transistor logic (TTL) arrays. [3] Complementary metal–oxide–semiconductor (CMOS) technology opened the door to the broad commercialization of gate arrays.
In field-effect transistors (FETs), depletion mode and enhancement mode are two major transistor types, corresponding to whether the transistor is in an on state or an off state at zero gate–source voltage. Enhancement-mode MOSFETs (metal–oxide–semiconductor FETs) are the common switching elements in most integrated circuits.
The common base current gain (or α) of a point-contact transistor is usually around 2 to 3, [4] whereas α of bipolar junction transistor (BJT) cannot exceed 1. The common emitter current gain (or β) of a point-contact transistor does not usually exceed 1, [4] whereas β of a BJT is typically between 20 and 200. Negative differential ...
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