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Bipolar current mirror - Circuit diagram

The circuit diagram example "Bipolar current mirror" was redesigned from the Wikipedia file: Current mirror.png.
[en.wikipedia.org/wiki/File:Current_mirror.png]
This file is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported license. [creativecommons.org/licenses/by-sa/3.0/deed.en]
"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. ...
Basic BJT current mirror.
If a voltage is applied to the BJT base-emitter junction as an input quantity and the collector current is taken as an output quantity, the transistor will act as an exponential voltage-to-current converter. By applying a negative feedback (simply joining the base and collector) the transistor can be "reversed" and it will begin acting as the opposite logarithmic current-to-voltage converter; now it will adjust the "output" base-emitter voltage so as to pass the applied "input" collector current.
The simplest bipolar current mirror ... implements this idea. It consists of two cascaded transistor stages acting accordingly as a reversed and direct voltage-to-current converters." [Current mirror. Wikipedia]
The circuit diagram example "Bipolar current mirror" was created using the ConceptDraw PRO diagramming and vector drawing software extended with the Electrical Engineering solution from the Engineering area of ConceptDraw Solution Park. Read more
Circuit diagram
Circuit diagram, junction, indicator, meter, galvanometer, ground connection, ground, fixed resistor, resistor, bipolar transistor, bipolar junction transistor, BJT, NPN,
The vector stencils library "Transistors" contains 30 symbols of transistors.
Use these shapes for drawing electronic schematics and circuit diagrams in the ConceptDraw PRO diagramming and vector drawing software extended with the Electrical Engineering solution from the Engineering area of ConceptDraw Solution Park.
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BJT, PNP, env
BJT, PNP, env, bipolar transistor, bipolar junction transistor, BJT, PNP,
BJT, PNP
BJT, PNP, bipolar transistor, bipolar junction transistor, BJT, PNP,
BJT, NPN, env
BJT, NPN, env, bipolar transistor, bipolar junction transistor, BJT, NPN,
BJT, NPN
BJT, NPN, bipolar transistor, bipolar junction transistor, BJT, NPN,
JFET, P, env
JFET, P, env, junction, FET, field-effect transistorl, P-type channel,
JFET, P
JFET, P, junction, FET, field-effect transistor, P-type channel,
JFET, N, env
JFET, N, env, junction, FET, field-effect transistor, N-type channel,
JFET, N
JFET, N, junction, FET, field-effect transistor, N-type channel,
Transverse biased base, PNP, env
Transverse biased base, PNP, env, transistor with transverse biased base, PNP,
Transverse biased base, PNP
Transverse biased base, PNP, transistor with transverse biased base, PNP,
Transverse biased base, NPN, env
Transverse biased base, NPN, env, transistor with transverse biased base, NPN,
Transverse biased base, NPN
Transverse biased base, NPN, transistor with transverse biased base, NPN,
Ohmic, NPIN, env
Ohmic, NPIN, env, transistor with ohmic connection to the intrinsic region, NPIN,
Ohmic, NPIN
Ohmic, NPIN, transistor with ohmic connection to the intrinsic region, NPIN,
Ohmic, NPIP, env
Ohmic, NPIP, env, transistor with ohmic connection to the intrinsic region, NPIP,
Ohmic, NPIP
Ohmic, NPIP, transistor with ohmic connection to the intrinsic region, NPIP,
Ohmic, PNIN, env
Ohmic, PNIN, env, transistor with ohmic connection to the intrinsic region, PNIN,
Ohmic, PNIN
Ohmic, PNIN, transistor with ohmic connection to the intrinsic region, PNIN,
Ohmic, PNIP, env
Ohmic, PNIP, env, transistor with ohmic connection to the intrinsic region, PNIP,
Ohmic, PNIP
Ohmic, PNIP, transistor with ohmic connection to the intrinsic region, PNIP,
Unijunction FET, P, env
Unijunction FET, P, env, unijunction FET, P-type channel,
Unijunction FET, P
Unijunction FET, P, unijunction FET, P-type channel,
Unijunction FET, N, env
Unijunction FET, N, env, unijunction FET, N-type channel,
Unijunction FET, N
Unijunction FET, N, unijunction FET, N-type channel,
Darlington transistor, PNP, env
Darlington transistor, PNP, env, Darlington transistor, PNP,
Darlington transistor, PNP
Darlington transistor, PNP, Darlington transistor, PNP,
Darlington transistor, NPN, env
Darlington transistor, NPN, env, Darlington transistor, NPN,
Darlington transistor, NPN
Darlington transistor, NPN, Darlington transistor, NPN,
Transistor latch, env
Transistor latch, env, transistor latch,
Transistor latch
Transistor latch, transistor latch,
The vector stencils library "Transistors" contains 30 symbols of transistors drawing electronic schematics and circuit diagrams.
"A transistor is a semiconductor device used to amplify and switch electronic signals and electrical power. It is composed of semiconductor material with at least three terminals for connection to an external circuit. A voltage or current applied to one pair of the transistor's terminals changes the current through another pair of terminals. Because the controlled (output) power can be higher than the controlling (input) power, a transistor can amplify a signal. Today, some transistors are packaged individually, but many more are found embedded in integrated circuits.
The transistor is the fundamental building block of modern electronic devices, and is ubiquitous in modern electronic systems. ...
Transistors are categorized by:
(1) Semiconductor material...: the metalloids germanium ... and silicon ... in amorphous, polycrystalline and monocrystalline form; the compounds gallium arsenide ... and silicon carbide ..., the alloy silicon-germanium ..., the allotrope of carbon graphene ...
(2) Structure: BJT, JFET, IGFET (MOSFET), insulated-gate bipolar transistor, "other types"
(3) Electrical polarity (positive and negative): n–p–n, p–n–p (BJTs); n-channel, p-channel (FETs)
(4) Maximum power rating: low, medium, high
(5) Maximum operating frequency: low, medium, high, radio (RF), microwave frequency...
(6) Application: switch, general purpose, audio, high voltage, super-beta, matched pair
(7) Physical packaging: through-hole metal, through-hole plastic, surface mount, ball grid array, power modules...
(8) Amplification factor..." [Transistor. Wikipedia]
The shapes example "Design elements - Transistors" was drawn using the ConceptDraw PRO diagramming and vector drawing software extended with the Electrical Engineering solution from the Engineering area of ConceptDraw Solution Park. Read more
Transistor symbols
Transistor symbols, unijunction FET, P-type channel, unijunction FET, N-type channel, transistor with transverse biased base, PNP, transistor with transverse biased base, NPN, transistor with ohmic connection to the intrinsic region, PNIP, transistor with ohmic connection to the intrinsic region, PNIN, transistor with ohmic connection to the intrinsic region, NPIP, transistor with ohmic connection to the intrinsic region, NPIN, transistor latch, junction, FET, field-effect transistorl, P-type channel, junction, FET, field-effect transistor, P-type channel, junction, FET, field-effect transistor, N-type channel, bipolar transistor, bipolar junction transistor, BJT, PNP, bipolar transistor, bipolar junction transistor, BJT, NPN, Darlington transistor, PNP, Darlington transistor, NPN,