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LM393 differential comparator manufactured by National Semiconductor. The following is a list of LM-series integrated circuits.Many were among the first analog integrated circuits commercially produced since late 1965; [1] some were groundbreaking innovations [opinion].
An equivalent circuit of an operational amplifier that models some resistive non-ideal parameters. An ideal op amp is usually considered to have the following characteristics: [5] [6] [7] Infinite open-loop gain G = v out / v in; Infinite input impedance R in, and so zero input current; Zero input offset voltage; Infinite output voltage range
The LM3900 was introduced in the mid 1970s, and was designed to be an easy to use single supply op amp with comparable input bias currents (~30nA) to other bi polar op-amps of the time period (LM741, LM324), while having rail to rail output and a much higher gain bandwidth product(2.5MHz).
Some manufacturers released some 4000-series equivalent CMOS circuits with a 74 prefix, for example, the 74HC4066 [2] was a replacement for the 4066 with slightly different electrical characteristics (different power-supply voltage ratings, higher frequency capabilities, lower "on" resistances in analog switches, etc.).
From a more specific name: This is a redirect from a title that is a more specific name to a less specific, more general one.. It may be a more specialized term, include extraneous identifiers, or simply be worded more narrowly.
Other opamps that people try, include: the CA3130EZ (MOSFET-based), the NE5535A / NE5534AP (high slew rate, low noise), the LM741 (low drive) and finally the TL071 / TL081 (both BI-FET based). Many RAT modders install an opamp socket to enable easy swapping of opamps, which is similar to what people do with the Ibanez Tube Screamer circuit.
Another model commonly used to analyze BJT circuits is the h-parameter model, also known as the hybrid equivalent model, closely related to the hybrid-pi model and the y-parameter two-port, but using input current and output voltage as independent variables, rather than input and output voltages. This two-port network is particularly suited to ...
Since 1-As/2Ad is approximately 0.99998 for a typical setup, these two definitions are equivalent for all practical purposes (the nonlinearity in Ad is probably much larger than the difference anyway). I am therefore removing the inaccuracy tag from the article. Han-Kwang 11:46, 7 April 2007 (UTC)