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The Kenbak-1 (1971) used small-scale integration transistor–transistor logic (TTL) ICs and had 256 bytes of memory. It was priced at USD 750 and sold only 40 units. [1] Datapoint 2200 (shipped 1971) was the first machine designed to use a microprocessor, but when Intel could not deliver the 8008 in time, they released the machine using ...
TRADIC. This is a list of transistorized computers, which were digital computers that used discrete transistors as their primary logic elements. Discrete transistors were a feature of logic design for computers from about 1960, when reliable transistors became economically available, until monolithic integrated circuits displaced them in the 1970s.
Therefore, circuit simulators normally use more empirical models (often called compact models) that do not directly model the underlying physics. For example, inversion-layer mobility modeling , or the modeling of mobility and its dependence on physical parameters, ambient and operating conditions is an important topic both for TCAD (technology ...
1 Built for the U.S.'s National Bureau of Standards, it had 2,300 vacuum tubes. It had 256 words (each 37 bits) of memory, using Williams tubes: ERA Atlas: 1950 (Military version of Univac 1101) Used 2,700 vacuum tubes for its logic circuits MADDIDA: 1950 6 Special-purpose digital computer for solving a system of differential equations.
Stub Series Terminated Logic (SSTL) is a group of electrical standards for driving transmission lines commonly used with DRAM based DDR memory IC's and memory modules. SSTL is primarily designed for driving the DDR (double-data-rate) SDRAM modules used in computer memory; however, it is also used in other applications, notably some PCI Express PHYs and other high-speed devices.
Transistor models are used for almost all modern electronic design work. Analog circuit simulators such as SPICE use models to predict the behavior of a design. Most design work is related to integrated circuit designs which have a very large tooling cost, primarily for the photomasks used to create the devices, and there is a large economic incentive to get the design working without any ...
After three years of development, RCA introduced by 1959 [1] the all-transistor RCA 501, a medium- to large-scale computer which – according to the sales brochures – was "the world's most advanced electronic data processing system". [2]
The current source transistor may be replaced with a resistor from the positive supply to the base of the inverter transistor, since discrete resistors are smaller and less expensive than discrete transistors. Similarly, the merged PNP current injector transistor and the NPN inverter transistor can be implemented as separate discrete components.