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OP285
OP285

... current load condition. When driving the input of an A/D converter, especially successive-approximation converters, the amplifier must maintain a constant output voltage under dynamically changing load current conditions. In these types of converters, the comparison point is usually diode clamped, b ...
DWARF II - Trigon Audio
DWARF II - Trigon Audio

... music and its emotions. The DWARF II unites precise technology, high operational safety and operating comfort. A long distance signal way protected switch design supervises the amplifier electronic. All operational conditions are switched with a frontage key through a relay and are signalised throug ...
GuitarCenter manual.q
GuitarCenter manual.q

... The Hafler TA1100 and TA1600 are two channel, two rack height, convection-cooled, MOSFET power amplifiers suitable for use in the most demanding applications of critical listening and instrument amplification. These amplifiers offer the same outstanding sonic quality and reliability that has contrib ...
JFET Amplifier
JFET Amplifier

Design Choices for Folded Cascode Operational Trans
Design Choices for Folded Cascode Operational Trans

EL5128 - Intersil
EL5128 - Intersil

... • VS = Total supply voltage • ISMAX = Maximum supply current per amplifier • VOUTi = Maximum output voltage of the application • ILOADi = Load current If we set the two PDMAX equations equal to each other, we can solve for RLOADi to avoid device overheat. Figures 27 and 28 provide a convenient way t ...
Transistors Amplifiers
Transistors Amplifiers

PDF
PDF

... current flowing through tail transistor is also done by increasing the gate voltage across the tail transistor by employing level change amplifier, which in turn increases the gate-to-source voltage for tail transistor. Due to this added circuitry, settling time and slew rate restored their base val ...
KA3842/3843
KA3842/3843

... specifically designed for Off-Line and DC-to-DC converter applications offering the designer a cost effective solution with minimal external components. These integrated circuits feature a trimmed oscillator for ...
450U-E Wireless Ethernet Modem Install Guide
450U-E Wireless Ethernet Modem Install Guide

... Digital Input (Transistor) ...
Lecture 5
Lecture 5

... The lay out of the circuit is very similar to that of the inverting amplifier or the integrator except that, in place of the feedback resistor R2 (of the inverter) or the capacitor C (of the integrator), we have a new component labelled D. In principle, and assuming the op amp to be ideal, in order ...
ekt 313 tutorial 4
ekt 313 tutorial 4

... Compared with the tuned radio frequency receiver (TRF) design, superhets offer better stability because a tuneable oscillator is more easily realized than a tuneable amplifier. Operating at a lower frequency, IF filters can give narrower passbands at the same Q factor than an equivalent RF filter. A ...
20 dB Adj. Gain Satellite Selector for DIRECTV
20 dB Adj. Gain Satellite Selector for DIRECTV

... The –75dBm level assumes that the overall system noise figure is not too high such that the carrier-to-noise ratio of the satellite signal has not been degraded such that signal recovery is not possible. Signal levels lower than –75dBm can be recovered with properly designed systems having over-all ...
Precision High Side Current Sense Amplifiers
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Signal Resistance of the Current Mirror
Signal Resistance of the Current Mirror

... .. so the current in R is equal to the voltage at X divided by R and it will flow upwards if the voltage at X is positive. The bottom of both hie, and hoe for Transistor 1, is also at 0 V, so the current in all of those resistances will flow downwards if the voltage at X is positive; the same will ...


... Products, Inc. Although these semiconductor strain gauge transducers are widely used, they can suffer from a number of drawbacks, such as being easily damaged by slight overloads applied to the force beam, causing the transducer to be non-functional, or have a very large offset voltage, that may not ...
Unregulated Power Supply Tutorial: Hey! Why is my 9V wall
Unregulated Power Supply Tutorial: Hey! Why is my 9V wall

... the load current is not constant. An open circuit (no load) measurement has very little current flowing and the power supply inherently has a small resistance (about 4 Ohms), so the load current multiplied with the Thevenin resistance, R0, is close to zero and the load voltage is nearly equivalent t ...
WPS-445124-02
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... underneath the package in Figure 2. The noise figure shown in Figure 3 was measured at room temperature. The noise figure is less than 6 dB. The supply current shown in Figure 4 is less than 1.5 A in small signal and increases to 1.85 A in large signal as the output power is increased to 37 dBm. The ...
4017512.pdf
4017512.pdf

... end of the ECG recorder must have the appropriate frequency characteristics, noise and dynamic range. On the other hand integrating signal conditioning functions at instrumentation amplifier module reduces complexity and power of the whole analog processing circuit. Hence by using ultra low-power im ...
CQ4301536541
CQ4301536541

... simulations. This search technique can be successfully applied to a class of optimization problems. After the simulation, most of the transistors’ size still needed to be modified in order to optimize the performance. High gain in operational amplifiers is not the only desired figure of merit for al ...
Putting it all together - Interfacing to a sensor
Putting it all together - Interfacing to a sensor

AD8614 数据手册DataSheet 下载
AD8614 数据手册DataSheet 下载

... VOUT is the AD8614/AD8644 output voltage. Figure 27 provides a convenient way to determine if the device is being overheated. The maximum safe power dissipation can be found graphically, based on the package type and the ambient temperature around the package. By using the previous equation, it is a ...
chap 5 Assignment
chap 5 Assignment

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TRA Series Data Sheet

... 100V installations with modest power requirements. ...
AN-573 APPLICATION NOTE
AN-573 APPLICATION NOTE

... for switchers. There are generally three classes of capacitors useful in filters in the 10 kHz to 100 MHz frequency range suitable for switchers. Capacitors are broadly distinguished by their generic dielectric types: electrolytic, film, and ceramic. Background and tutorial information on capacitors ...
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Amplifier



An amplifier, electronic amplifier or (informally) amp is an electronic device that increases the power of a signal.It does this by taking energy from a power supply and controlling the output to match the input signal shape but with a larger amplitude. In this sense, an amplifier modulates the output of the power supply to make the output signal stronger than the input signal. An amplifier is effectively the opposite of an attenuator: while an amplifier provides gain, an attenuator provides loss.An amplifier can either be a separate piece of equipment or an electrical circuit within another device. The ability to amplify is fundamental to modern electronics, and amplifiers are extremely widely used in almost all electronic equipment. The types of amplifiers can be categorized in different ways. One is by the frequency of the electronic signal being amplified; audio amplifiers amplify signals in the audio (sound) range of less than 20 kHz, RF amplifiers amplify frequencies in the radio frequency range between 20 kHz and 300 GHz. Another is which quantity, voltage or current is being amplified; amplifiers can be divided into voltage amplifiers, current amplifiers, transconductance amplifiers, and transresistance amplifiers. A further distinction is whether the output is a linear or nonlinear representation of the input. Amplifiers can also be categorized by their physical placement in the signal chain.The first practical electronic device that amplified was the Audion (triode) vacuum tube, invented in 1906 by Lee De Forest, which led to the first amplifiers. The terms ""amplifier"" and ""amplification"" (from the Latin amplificare, 'to enlarge or expand') were first used for this new capability around 1915 when triodes became widespread. For the next 50 years, vacuum tubes were the only devices that could amplify. All amplifiers used them until the 1960s, when transistors appeared. Most amplifiers today use transistors, though tube amplifiers are still produced.
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