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Physics 517/617 Experiment 4 Transistors - 1 R I
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Section C5: Single-Stage BJT Amplifier Configurations
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... car is turned off. The car battery will no longer operate when it has lost 1.2 x 106 J of energy. If Tyler gets out of the car and leaves the radio on by mistake, how long will it take for the car battery to go completely dead (that is, lose all energy)? 12. In your home the refrigerator is on 24 hr ...
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... series circuit has a time constant of 600 μs, and the maximum current is 300 mA. What’s the value of the inductance? 3. Calculate the resistance in an RL circuit in which L = 2.50 H and the current increases to 90.0% of its final value in 3.00 s. 4. How much energy is stored in a 70 mH inductor at a ...
Ohm`s law
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... Voltage is the electrical potential energy a charge has due to its position in space • potential energy per unit of charge • "path independent“ Voltage is measured in Joules/Coulomb or Volts (V) ...
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... attaches through internal 2.3KΩ resistor to current mirror master. • monSF- Allows monitoring of current source gate voltage. Diagnostic only. -->Not pinned out.<-Outputs: • outPlus – positive (voltage) going output. (3mA sink-source) • outMinus – negative (voltage) going output. (3mA sink-source) O ...
Homework 4 - University of St. Thomas
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... #5: Why can current persist in a superconductor with no applied voltage? #34: You touch a defective appliance while standing on the ground and you feel the tingle of a 2.5mA current. What’s your resistance, assuming you’re touching the hot side of the 120V household wiring? ...
Two low power LED flashers
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... ABOUT LED's A diode is a two wire component that only passes current when the voltage is applied correctly across it. Reverse wiring passes no current and for small voltages the device will act as a standard diode but it will brake down when higher voltages are applied. The LED, or Light Emitting D ...
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9103 USB Picoammeter Datasheet

... If the current is in the range of measurement of the instrument, the voltage drop should be less than ± 26 μV + (3.2 * I), where I is the current flowing into the instrument, 3.2 is the resistance of the fuse, and ± 26 μV is the offset voltage spec. of the op-amp. The current measurement circuit use ...
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... Unit 1.2 Electronic Principles: Ohm’s Law Ohm’s Law is the relationship between voltage, current, and the resistance in a DC circuit. When you know any two of these values, you can calculate the third. The most basic equation for Ohm’s Law is: E = I ×R In other words, when you know the current going ...
ultra high voltage operational amplifier
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... A 100 ohm resistor and a 330pF capacitor connected in series from the output of the amplifier to ground is recommended for applications where load capacitance is less than 330pF. For larger values of load capacitance, the output snubber network may be omitted. If loop stability becomes a problem due ...
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< 1 ... 942 943 944 945 946 947 948 949 950 ... 984 >

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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