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Resistors and Resistance
Resistors and Resistance

... The figure below gives the electrical potential V(x) along a copper wire carrying a uniform current, from a point at higher potential (x=0m) to a point at a lower potential (x=3m). The wire has a radius of 2.45 mm. What is the current in the wire? What does the graph tell us?? ...
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... Electromotive Force (emf): conversion from some other form of energy into electrical energy voltage rise, potential increase Potential difference (pd): conversion from electrical energy into some other form of energy voltage drop, potential decrease ...
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... power delivered through an electrical outlet (120Vrms, 60Hz) with a power rating of approximately 1000W. Electronic devices run on AC power, however, batteries and some forms of power generation produce a DC voltage so it is necessary to convert the voltage into a source that devices can use. A low ...
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... Reliable startup of heavy loads is ensured by a power reserve of up to 50% - the POWER BOOST. Preventive function monitoring diagnoses an impermissible operating state and minimizes downtimes in your system. An active transistor output and an electrically isolated relay contact are provided for remo ...
MAX882/MAX883/MAX884 5V/3.3V or Adjustable, Low-Dropout, Low I , 200mA Linear Regulators
MAX882/MAX883/MAX884 5V/3.3V or Adjustable, Low-Dropout, Low I , 200mA Linear Regulators

... allowing a fixed output of 5V for the MAX883 and 3.3V for the MAX882/MAX884, or an adjustable output from 1.25V to 11V. These devices supply up to 200mA while requiring less than 15µA quiescent current. As illustrated in Figure 1, they consist of a 1.20V reference, error amplifier, MOSFET driver, p- ...
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... The reset output (RST) pulls low when OUT is less than 86% of the nominal regulation voltage. Once OUT exceeds 86% of the nominal voltage, RST goes high impedance after 4.5ms. RST is an open-drain N-channel output. To obtain a voltage at RST, connect a pullup resistor from RST to OUT. A 100kΩ resist ...
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Current mirror

A current mirror is a circuit designed to copy a current through one active device by controlling the current in another active device of a circuit, keeping the output current constant regardless of loading. The current being 'copied' can be, and sometimes is, a varying signal current. Conceptually, an ideal current mirror is simply an ideal inverting current amplifier that reverses the current direction as well or it is a current-controlled current source (CCCS). The current mirror is used to provide bias currents and active loads to circuits. It can also be used to model a more realistic current source (since ideal current sources don't exist).The circuit topology covered here is one that appears in many monolithic ICs. It is a Widlar mirror without an emitter degeneration resistor in the follower (output) transistor. This topology can only be done in an IC as the matching has to be extremely close and cannot be achieved with discretes.Another topology is the Wilson mirror. The Wilson mirror solves the Early effect voltage problem in his design.
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