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Variable Resistors - La Favre home page
Variable Resistors - La Favre home page

... between the middle pin and outer pins will be reversed. When the pot is adjusted to the middle of its range, then there will be 5,000 ohms resistance between the middle pin and both right and left pins. It is possible to adjust the pot to get any resistance you desire between 0 and 10,000 ohms. You ...
74LS122
74LS122

... The output pulse tW is a function of the external components, Cext and Rext or Cext and Rint on the LS122. For values of Cext ≥ 1000 pF, the output pulse at VCC = 5.0 V and VRC = 5.0 V (see Figures 1, 2, and 3) is given by tW = K Rext Cext where K is nominally 0.45 If Cext is on pF and Rext is in kΩ ...
Capacitance in ac circuits
Capacitance in ac circuits

... for the resistor, the capacitor and the inductor. The total opposition to current is affected by all of the circuit components and is called the impedance (Z). You will see that the current through a resistor is in phase with the voltage, but that the capacitor and inductor cause phase shifts betwee ...
Interleaved Boost Converter With Intrinsic Voltage
Interleaved Boost Converter With Intrinsic Voltage

... of mechanical range-select switches is not allowed in server applications and electronic range-select switches are not desirable because of their detrimental effect on efficiency, as well as possible reliability issues and increased cost. In high-power applications, interleaving of two boost convert ...
Student Biographies
Student Biographies

RSDA-660-75-100 Datasheet
RSDA-660-75-100 Datasheet

... Fast Switching Solid state relays can switch up to 120 times per second, much faster than any electromechanical relay. When used in heating applications, fast cycling can dramatically improve the life of the heater by reducing thermal stress. ...
PCA9517A - Level Translating I2C Bus Repeater
PCA9517A - Level Translating I2C Bus Repeater

J. Lu, D.J. Perreault, D. Otten, and K.K. Afridi, “Impedance Control Network Resonant Converter for Wide-Range High-Efficiency Operation,” IEEE Transactions on Power Electronics , (to appear).
J. Lu, D.J. Perreault, D. Otten, and K.K. Afridi, “Impedance Control Network Resonant Converter for Wide-Range High-Efficiency Operation,” IEEE Transactions on Power Electronics , (to appear).

... values below that indicated in Fig. 7) using burst mode (on/off) control, in which the operation of the converter is modulated on and off at a frequency much lower than its switching frequency [17]-[19]. On/off control is desirable because converter losses back off proportionally to power delivered, ...
Design of a proper set-up for low current
Design of a proper set-up for low current

... This case is similar to the shunt ammeter but with a buffer amplifier between the shunt resistance and the operational amplifier. This case is used when the current measured is really low and the input bias current can be around the same range of the desired measured values. For that reason, a speci ...


... GaN HFETs can provide higher voltage operation and higher power density at microwave frequencies than other high power devices and thus are attractive for application to commercial high-power base stations. Recently, high-performance GaN HFETs on Si substrates (instead of the more customary sapphire ...
Light sensor : processing signal circuit design - e
Light sensor : processing signal circuit design - e

Subthreshold FinFET for Low Power Circuit Operation: A Study of
Subthreshold FinFET for Low Power Circuit Operation: A Study of

... thus better Ion for a fixed Ioff than short channel FinFETs. We intend to study if upsizing the PMOS transistors can be used to improve hold stability, while also decreasing DRV as explained earlier in the paper. Read Stability: This can be quantified by the cell SNM during a read access. During a r ...
TPA3113D2 数据资料 dataSheet 下载
TPA3113D2 数据资料 dataSheet 下载

LM317 - Electronics
LM317 - Electronics

... Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is intended to be functional, but do not guarantee specific performance limits. For guaranteed specifications and test conditions, see the Electric ...
Diapositiva 1 - University of Hong Kong
Diapositiva 1 - University of Hong Kong

... 1. Low specific energy <10 [Wh/kg] for standard ultra-capacitors 2. Voltage varies with state of charge Need for interface converter 3. High self-discharge rate 4. Low cell voltage. Need for series connection of cells into a module 5. Low internal resistance may create an issue in case of short circ ...
Chapter 21 AC Circuits
Chapter 21 AC Circuits

... Recall that a capacitor C with Voltage V across it has charge Q=CV Current I= dQ/dt = C dV/dt In a circuit with a capacitor and resistor in parallel the voltage across the resistor must equal opposite that across the capacitor Hence Vc = -VR or Q/C = -IR or Q/C + IR = 0 (note the current I thru the ...
MAX6682 Thermistor-to-Digital Converter General Description Features
MAX6682 Thermistor-to-Digital Converter General Description Features

... 1 / T = A + BlnR + C(lnR)3 where T is absolute temperature, R is the thermistor’s resistance, and A, B, and C are coefficients that vary with manufacturer and material characteristics. The general shape of the curve is shown in Figure 1. The highly nonlinear relationship between temperature and resi ...
Sec - W5DXP.com
Sec - W5DXP.com

... terminals, when the impedance of the receiving network is varied, if the impedances looking into the two networks are conjugates of each other. A corollary of this theorem is that there is a conjugate match if the delivery of power decreases when the receiving impedance (the load) is either increase ...
Final Report - University of Portland
Final Report - University of Portland

... An electronic ballast is an apparatus that controls the current flow into a circuit. In this case, the circuit is a fluorescent lamp. There are various types of ballasts, but the electronic ballast increases the input frequency (typically 60 Hz in the United States) to a much higher frequency in the ...
ADC0801/ADC0802/ADC0803/ADC0804/ADC0805 8-Bit mP Compatible A/D Converters 8-Bit m
ADC0801/ADC0802/ADC0803/ADC0804/ADC0805 8-Bit mP Compatible A/D Converters 8-Bit m

... Note 4: For VIN( b ) t VIN( a ) the digital output code will be 0000 0000. Two on-chip diodes are tied to each analog input (see block diagram) which will forward conduct for analog input voltages one diode drop below ground or one diode drop greater than the VCC supply. Be careful, during testing a ...
PSpice Tutorial
PSpice Tutorial

... A very important point should be considered first: The PSpice system computes voltage values relative to a common potential (referred to as a “Ground” potential). Without a specification for this Ground potential, the circuit simulation may not proceed (the circuit simulation algorithm does not mak ...
ADC0801 ADC0802 ADC0803 ADC0804 ADC0805 8
ADC0801 ADC0802 ADC0803 ADC0804 ADC0805 8

... Note 4: For VIN( b ) t VIN( a ) the digital output code will be 0000 0000. Two on-chip diodes are tied to each analog input (see block diagram) which will forward conduct for analog input voltages one diode drop below ground or one diode drop greater than the VCC supply. Be careful, during testing a ...
SN75155 数据资料 dataSheet 下载
SN75155 数据资料 dataSheet 下载

... Supply voltage, VCC + (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 V Supply voltage, VCC − (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...
Analysis of the
Analysis of the

... The voltage at the inverting terminal of the op-amp is zero! Thus, since the non-inverting terminal is grounded (v2 =0), we find that: v  v and  v  v  0 Recall that this should not surprise us, as we know that if opoc amp gain Aop is infinitely large, its output vout will also be infinitely ...
The circuit current
The circuit current

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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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