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Diode-connected BJT
Diode-connected BJT

... current (very often there is only one even in a large circuit): Only VBE and resistors are in this path. • Type of transistor will tell you the expected direction of current: npn - current sink, pnp - current source. • Identify current mirror configurations (Widlar, Wilson, etc.) and respective emit ...
50W Multiple-Stage Constant Current Mode LED Driver LCM
50W Multiple-Stage Constant Current Mode LED Driver LCM

THE DC OPERATING POINT
THE DC OPERATING POINT

LTC1151 - Dual ±15V Zero-Drift Operational Amplifier
LTC1151 - Dual ±15V Zero-Drift Operational Amplifier

... frequency. The LTC1151 includes a high frequency correction loop which minimizes this effect. As a result, aliasing is not a problem for many applications. For a complete discussion of the correction circuitry and aliasing behavior, please refer to the LTC1051/LTC1053 data sheet. ...
IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE) e-ISSN: 2278-1676,p-ISSN: 2320-3331,
IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE) e-ISSN: 2278-1676,p-ISSN: 2320-3331,

Experiment 13: Op-Amp / Controlled Voltage Source
Experiment 13: Op-Amp / Controlled Voltage Source

SGM721/2/3/4 970µA,10MHz, Rail-to-Rail I/O CMOS
SGM721/2/3/4 970µA,10MHz, Rail-to-Rail I/O CMOS

... with shutdown) and SGM724 (quad) are low noise, low voltage, and low power operational amplifiers, that can be designed into a wide range of applications. The SGM721/2/3/4 have a high Gain- Bandwidth Product of 10MHz, a slew rate of 8.5V/µs, and a quiescent current of 0.97mA/amplifier at 5V. The SGM ...
LM124/LM224/LM324/LM2902 Low Power Quad Operational
LM124/LM224/LM324/LM2902 Low Power Quad Operational

... both source and sink large output currents. Therefore both NPN and PNP external current boost transistors can be used to extend the power capability of the basic amplifiers. The output voltage needs to raise approximately 1 diode drop above ground to bias the on-chip vertical PNP transistor for outp ...
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... enter the base • Thin and lightly doped base diffuse electrons into collector • Collector, through RC and into the positive terminal of VCC ...
vxr15-2800s series
vxr15-2800s series

... The outputs of multiple converters can be stacked in series to provide higher voltages. When outputs of multiple modules are stacked, they naturally share the load. For example, two VXR15-2812S converters can be stacked to provide a 24 V DC output at 30 W. ...
R120LC DC Operated Low Cost RVIT  SPECIFICATIONS
R120LC DC Operated Low Cost RVIT SPECIFICATIONS

... Connectivity, TE, and the TE connectivity (logo) are trademarks of the TE Connectivity Ltd. family of companies. Other logos, product and company names mentioned herein may be trademarks of their respective owners. The information given herein, including drawings, illustrations and schematics which ...
Class 15: Input / Output Circuits
Class 15: Input / Output Circuits

... If an oxide has a resistance of 1x109 ohms, what current exists at 1kV? I = 1e3 / 1e9 = 1e-6 C/s Q = 1e-6 C/s / 1.602e-19C/e- ~ 6e12 e-/s -does not take very much charge to be placed on a gate to charge to 1kV When charge is present, the desire is to shunt it to ground or power ...
EL5191, EL5191A 1GHz Current Feedback Amplifier with Features Enable
EL5191, EL5191A 1GHz Current Feedback Amplifier with Features Enable

... Capacitance at the Inverting Input section) Even when ground plane construction is used, it should be removed from the area near the inverting input to minimize any stray capacitance at that node. Carbon or Metal-Film resistors are acceptable with the Metal-Film resistors giving slightly less peakin ...
ADP3309 数据手册DataSheet 下载
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UJT - ECB2181
UJT - ECB2181

... The curve between Emitter voltage Ve and emitter current Ie of a UJT at a given voltage Vbb between the bases this is known as emitter characteristics of UJT Initially in the cut off region as Ve increases from zero, slight leakage current flows from terminal B2 to the emitter the current is due to ...
LM124/LM224/LM324/LM2902 Low Power Quad
LM124/LM224/LM324/LM2902 Low Power Quad

... dissipation ratings and cause eventual destruction. Destructive dissipation can result from simultaneous shorts on all amplifiers. Note 6: This input current will only exist when the voltage at any of the input leads is driven negative. It is due to the collector-base junction of the input PNP trans ...
LM124
LM124

Bioelectric Amplifiers
Bioelectric Amplifiers

RT8300 - Richtek
RT8300 - Richtek

... The RT8300 provides four channel constant currents with less than 3% differences in output current value among the 4-CH and ICs respectively. The constant current output is adjustable from 5mA to 150mA via an external resistor (RISET). The LED brightness can also be adjusted via the PWMI pin with pu ...
Spice - kahrbjy
Spice - kahrbjy

... Circuits are described to SPICE by use of an input file (*.CIR) prepared by an ASCII text editor called the source file, which lists each circuit element (resistor, capacitor, inductor, voltage sources, current sources, semiconductor devices) and indicates how each is connected using node numbers. I ...
FEATURES APPLICATIONS DESCRIPTION FUNCTIONAL BLOCK
FEATURES APPLICATIONS DESCRIPTION FUNCTIONAL BLOCK

... 10 KGauss of external magnetic field can be tolerated up to a frequency of 100KHz. Beyond 100 KHz, the maximum recommended magnetic field decreases by 20 dB/decade. 4. The minimum pulse width is the shortest pulsewidth at which the specified pulse width distortion is guaranteed. 5. The maximum data ...
DM7474 Dual Positive-Edge-Triggered D Flip
DM7474 Dual Positive-Edge-Triggered D Flip

... Note 5: All typicals are at VCC = 5V, TA = 25˚C. Note 6: Not more than one output should be shorted at a time. Note 7: With all outputs open, ICC is measured with the Q and Q outputs high in turn. At the time of measurement the clock is grounded. ...
New Linear Regulators Solve Old Problems
New Linear Regulators Solve Old Problems

AN-6961 Critical Conduction Mode PFC Controller  Description
AN-6961 Critical Conduction Mode PFC Controller Description

... sensing the information on an auxiliary winding of the PFC inductor. As discussed previously, when the ZCD voltage is lower than the threshold voltage (1.75V typical), the PWM output is high again and initiates a new switching cycle. However, there is a prerequisite: the zero-current detector voltag ...
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Wilson current mirror



A Wilson current mirror is a three-terminal circuit (Fig. 1) that accepts an input current at the input terminal and provides a ""mirrored"" current source or sink output at the output terminal. The mirrored current is a precise copy of the input current. It may be used as a Wilson current source by applying a constant bias current to the input branch as in Fig. 2. The circuit is named after George R. Wilson, an integrated circuit design engineer who worked for Tektronix. Wilson devised this configuration in 1967 when he and Barrie Gilbert challenged each other to find an improved current mirror overnight that would use only three transistors. Wilson won the challenge.
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