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A DC-4-ghz true logarithmic amplifier: theory and implementation
A DC-4-ghz true logarithmic amplifier: theory and implementation

... OGARITHMIC amplifiers are widely used in radar receivers to compress the high dynamic range of received signals. They were developed, in part, out of the need to replace automatic gain control (AGC) circuits with a higher dynamic range circuit. The scattering and multipath experienced by radar signa ...
L272 / L272A Dual Power Operational Amplifier L272 / L272 A —
L272 / L272A Dual Power Operational Amplifier L272 / L272 A —

... amplifiers provided in a MDIP 8-lead package. The operational amplifier is designed for low-impedance loads and delivers output current up to 0.7 A. The L272A offers tighter specifications for input bias current, input offset voltage, and input offset current. The L272 and L272A can be used in a wid ...
Lab 1 - ece.unm.edu
Lab 1 - ece.unm.edu

A Broadband 10-GHz Track-and-Hold in Si/SiGe HBT Technology , Student Member, IEEE,
A Broadband 10-GHz Track-and-Hold in Si/SiGe HBT Technology , Student Member, IEEE,

... bridge; preliminary simulations indicate that pMOS current sources would not be effective at input bandwidths much above 1 GHz. Fortunately, high-quality-factor inductors are available in a Si/SiGe HBT technology, creating the possibility of employing series inductance to raise the impedance of the ...
Activity 6A
Activity 6A

... natural commutation. The turn-off time,tq, is of the order of 50 to 100 µs. This is most suited for low-speed switching applications and is also known as converter thyristor. Since a thyristor is basically a silicon-made controlled device, it is also known as silicon-controlled rectifier (SCR). The ...
Feedback
Feedback

a AN-584 APPLICATION NOTE
a AN-584 APPLICATION NOTE

... the transfer function is controllable by adding passive feedback networks. However, only one feedback network is required to “close the loop” and fully constrain the operation. But depending on the function desired, two feedback networks can be used. This is possible as a result of having two output ...
AD8571
AD8571

... combine low cost with high accuracy. (No external capacitors are required.) Using a patented spread-spectrum, auto-zero technique, the AD857x family eliminates the intermodulation effects from interaction of the chopping function with the signal frequency in ac applications. With an offset voltage o ...
isl8011 - ISL8011 - 1.2A Integrated FETs, High Efficiency
isl8011 - ISL8011 - 1.2A Integrated FETs, High Efficiency

... microprocessor. The output voltage is monitored through the FB pin. When the voltage of the monitored node is within the window of 0.736V and 0.864V, a power-good signal is issued to turn off the open-drain POR pin. The rising edge of the POR output is delayed by 200ms. ...
BUF634 250mA HIGH
BUF634 250mA HIGH

... current. Internal circuitry limits output current to approximately ±350mA—see typical performance curve “Short Circuit Current vs Temperature”. For many applications, however, the continuous output current will be limited by thermal effects. The output voltage swing capability varies with junction t ...
Data Sheets
Data Sheets

... TRANSCONDUCTANCE AMPLIFIERS The PFC voltage feedback, PFC current sense, and the loop current amplifiers are all implemented as operational transconductance amplifiers. They are designed to have low small signal forward transconductance such that a large value of load resistor (R1) and a low value c ...
AD8571,72,74 - Analog Devices
AD8571,72,74 - Analog Devices

... amplifiers. Using Analog Devices, Inc., topology, these zerodrift amplifiers combine low cost with high accuracy. (No external capacitors are required.) Using a spread-spectrum, auto-zero technique, the AD8571/AD8572/AD8574 eliminate the intermodulation effects from interaction of the chopping funct ...
TLE2301  EXCALIBUR 3-STATE-OUTPUT WIDE-BANDWIDTH POWER OPERATIONAL AMPLIFIER
TLE2301 EXCALIBUR 3-STATE-OUTPUT WIDE-BANDWIDTH POWER OPERATIONAL AMPLIFIER

... VO(PP) – Maximum Peak-to-Peak Output Voltage – V ...
Introduction - Peekel Instruments
Introduction - Peekel Instruments

... High-accuracy measuring at the output of passive transducers is usually configured into some sort of a Wheatstone Bridge circuit which always needs some form of reference (bridge supply) voltage. DC bridge supply is by far the most popular for resistive transducers, but when it comes to the highest ...
OP213 - Farnell
OP213 - Farnell

... Digital scales and other strain gage applications benefit from the very low noise and low drift of the OPx13 family. Other applications include use as a buffer or amplifier for both analogto-digital (ADC) and digital-to-analog (DAC) sigma-delta converters. Often these converters have high resolution ...
here - Harman Kardon
here - Harman Kardon

... Thank you for purchasing a Lexicon Power Amplifier. The GX-7 is a high-performance power amplifier designed to meet the rigorous demands of today’s home theater installations. It is designed with full complementary circuitry from input to output. It includes a high-current power supply driven by a m ...
Introduction to Filters
Introduction to Filters

... function of frequency on a linear frequency scale to a high enough frequency to show the high end dropoff of the amplifier, both the areas of gain drop-off will be very small and not show much detail. These are the regions of primary interest. For this reason the frequency-response curve is plotted ...
Regulating Pulse Width Modulators
Regulating Pulse Width Modulators

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Document

... output dc voltage, Vout from a second terminal, with the third terminal connected to ground. ...
AN-107 - IXYS Integrated Circuits Division
AN-107 - IXYS Integrated Circuits Division

... mode of operation is usually selected for high speed modem circuits due to the improved linearity and lower noise. Figure 6 shows a schematic of this DAA. The LOC210P or LOC211P is connected in a similar manner to the circuit shown in Figure 4. While there are many ways to design a DAA with the LOC, ...
AD8225 英文数据手册DataSheet 下载
AD8225 英文数据手册DataSheet 下载

... the integrity of the desired signal, while the high frequency common-mode performance at the receiver rejects noise on the transmission line. The reference of the receiver may be connected to local ground or the reference pin of an A/D converter (ADC). ...
PCB504 Let`s build an ECG amplifier Semester 1 1998
PCB504 Let`s build an ECG amplifier Semester 1 1998

... frequency signals you expect in the ECG, about 0.05Hz. Explain why! This can lead to the problem that the circuit may take an inconvenient amount of time to stabilise after connecting it to a patient or changing the electrode lead connections. Another way of coping with the DC offset due to small di ...
RF - UU Indico
RF - UU Indico

MODEL: M6DVS
MODEL: M6DVS

... • This equipment is suitable for use in a Pollution Degree 2 environment and in Installation Category II, with the maximum voltage of 300V. Basic insulation is maintained between signal input and output. Prior to installation, check that the insulation class of this unit satisfies the system requi ...
AD8476 数据手册DataSheet 下载
AD8476 数据手册DataSheet 下载

... The AD8476 is a very low power, fully differential precision amplifier with integrated gain resistors for unity gain. It is an ideal choice for driving low power, high performance ADCs as a single-ended-to-differential or differential-to-differential amplifier. It provides a precision gain of 1, com ...
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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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