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From: Wilf Rigter <wilf
From: Wilf Rigter

... noninvering mode, the 47K resistor can only drive very small loads. This restricts the use of this reverser to driving output loads like a slave bicore or a HC139 type h-bridge but NOT a 4 or 6 transistor h-bridge input! Ian's almost complete walker is an example of this XOR reverser used between th ...
File mic502 | allcomponents.ru
File mic502 | allcomponents.ru

... A triangle-wave generator and threshold detector comprise the internal pulse-width modulator (PWM). The PWM’s output duty-cycle is determined by the higher of VT1 or VT2. A typical voltage range of 30% to 70% of VDD applied to the VT1 and VT2 pins corresponds to 0% to 100% duty-cycle. Since at least ...
Integrated Synthesizer and VCO ADF4360-7
Integrated Synthesizer and VCO ADF4360-7

... Chip Enable. A logic low on this pin powers down the device and puts the charge pump into three-state mode. Taking the pin high powers up the device depending on the status of the power-down bits. Charge Pump Output. When enabled, this provides ± ICP to the external loop filter, which in turn drives ...
Simultaneous Communication and Processor Voltage Scaling for Dynamic and
Simultaneous Communication and Processor Voltage Scaling for Dynamic and

... on fat wires has been proposed in [18]. Similar to processors with supply voltage scaling capability, approaches for link voltage scaling were recently presented in [17, 21]. An approach for communication speed selection was outlined in [13]. Another possibility to reduce communication energy is the ...
What Does an AC Voltmeter Measure? - Physics
What Does an AC Voltmeter Measure? - Physics

... along the path of its conductors. To see this, note that for a cylindrical, resistive medium of length l, radius r, and electrical conductivity σ that obeys Ohm’s law J = σE, where J = I l̂/πr2 and I is the (uniform) axial current, then El = J l/σ = Il/πr2 σ = IR, and the (axial) electrical resistan ...
ispark manual 62_05_bs - Physikalisch
ispark manual 62_05_bs - Physikalisch

... Please notice, that ispark crops calculated Co to IEC reported ones; these are presented not rounded. Calculated ones are rounded to two decimal digits, which is because nobody really can claim more precision with spark ignition. Therefore, with small inductances, Co may stay all the same. Note: The ...
Complex Waveforms
Complex Waveforms

... list and explain some sources of harmonics ...
Pdf - Text of NPTEL IIT Video Lectures
Pdf - Text of NPTEL IIT Video Lectures

Aalborg Universitet Autonomous Control of Inverter-Interfaced Distributed Generation Units for Harmonic
Aalborg Universitet Autonomous Control of Inverter-Interfaced Distributed Generation Units for Harmonic

White noise in MOS transistors and resistors
White noise in MOS transistors and resistors

... conducted on a transistor with WIL = lo4 for a saturation current of 40 nA (Fig. 1). A gigantic transistor size was used to scale up the tiny subthreshold currents to levels between 10 nA and l pA and make them easily measurable by a low-noise off-chip sense amplifier with commercially available res ...
ltc1694.pdf
ltc1694.pdf

... The LT C®1694 is a dual SMBus active pull-up designed to enhance data transmission speed and reliability under all specified SMBus loading conditions. The LTC1694 is also compatible with the Philips I2CTM Bus. The LTC1694 allows multiple device connections or a longer, more capacitive interconnect, ...
ON Thyristor Application Note
ON Thyristor Application Note

AD7787 数据手册DataSheet下载
AD7787 数据手册DataSheet下载

... The DOUT/RDY falling edge can be used as an interrupt to a processor, indicating that valid data is available. With an external serial clock, the data can be read using the DOUT/RDY pin. With CS low, the data/control word information is placed on the DOUT/RDY pin on the SCLK falling edge and is vali ...
Considerations for Using High-Impedance or Low
Considerations for Using High-Impedance or Low

eBook AQA GCSE Physics Unit P2 Part 2
eBook AQA GCSE Physics Unit P2 Part 2

... operation of every electrical appliance, from small touchscreen mobile phones to large 3D TVs. An understanding of electric current is essential to all scientists, engineers, and anyone interested in how things work. In this unit you will learn about electric circuits, the differences between static ...
Development of an Ultra Stable Klystron
Development of an Ultra Stable Klystron

Ch 22 Solutions Glencoe 2013
Ch 22 Solutions Glencoe 2013

DS2788 Stand-Alone Fuel-Gauge IC with LED Display Drivers General Description
DS2788 Stand-Alone Fuel-Gauge IC with LED Display Drivers General Description

... respect to VSS over a range of 0 to 4.5V, with a resolution of 4.88mV. The result is updated every 440ms and placed in the Voltage (VOLT) register in two’s complement form. Voltages above the maximum register value are reported at the maximum value; voltages below the minimum register value are repo ...
Low Distortion 1.0 GHz Differential Amplifier
Low Distortion 1.0 GHz Differential Amplifier

... The same results could be found using a Smith Chart as shown in Figure 7. In this example, a shunt capacitor and a series inductor are used to match the 200 Ω source to a 50 Ω load. For a frequency of 10 MHz, the same capacitor and inductor values previously found using the resonant approach will tr ...
Nanotechnology Measurement Handbook
Nanotechnology Measurement Handbook

ADCLK854 数据手册DataSheet 下载
ADCLK854 数据手册DataSheet 下载

... responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog ...
The singing arc: the oldest memristor?
The singing arc: the oldest memristor?

HMC478MP86
HMC478MP86

... Transistor (HBT) Gain Block MMIC SMT amplifier covering DC to 4 GHz. This Micro-P packaged amplifier can be used as a cascadable 50 Ohm RF/IF gain stage as well as a LO or PA driver with up to +20 dBm output power. The HMC478MP86 offers 22 dB of gain with a +32 dBm output IP3 at 850 MHz while requir ...
SE2574L 数据资料DataSheet下载
SE2574L 数据资料DataSheet下载

... regarding exposure to moisture after the container seal is broken, otherwise, problems related to moisture absorption may occur when the part is subjected to high temperature during solder assembly. The SE2574L is capable of withstanding a Pb free solder reflow. Care must be taken when attaching thi ...
Chapter 1
Chapter 1

... by Sedra and Smith Oxford Publishing Oxford University Publishing Microelectronic Circuits by Adel S. Sedra and Kenneth C. Smith (0195323033) ...
< 1 ... 57 58 59 60 61 62 63 64 65 ... 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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