Amplifier Circuit

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Operational Amplifier Voltage Line Circuit

Published:2011/5/17 8:31:00 Author:Robert | Keyword: Operational Amplifier, Voltage, Line

The Operational Amplifier Voltage Line Circuit is shown below.   (View)

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Wideband Amplifier Circuit

Published:2011/5/17 7:21:00 Author:Robert | Keyword: Wideband, Amplifier

The Wideband Amplifier Circuit is shown below. The picture (a) and picture (b) have not only the differences on the input signal's symbol, but also the differences on the input impedance |Ze|. Its main technical data is listed below. Amplifier TypeOut-phase input port (picture a) In-phase input port (picture b) Low frequency closed-loop amplification factor |Vo'| 100 100 3dB bandwidth b >20MHz >20MHz Supply Voltage Up=-Un 8V 8V Input impedance |Ze| 111Ω >100kΩ Load Capacitance Cl <=22pF <=22pF   (View)

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Wideband Operational Amplifier Circuit

Published:2011/5/17 7:10:00 Author:Robert | Keyword: Wideband, Operational Amplifier

The Wideband Operational Amplifier Circuit is shown below.   (View)

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Electric E Amplification Circuit

Published:2011/5/17 6:53:00 Author:Robert | Keyword: Electric E, Amplification

The Electric E Amplification Circuit is shown below.   (View)

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AD574A interface circuit

Published:2011/5/16 7:55:00 Author:Christina | Keyword: interface circuit

The 8051 single chip device and the AD574A's interface circuit is as shown, this circuit uses the three-state latcher 74LS373 and 74LS00 NAND gate circuit, the logic control signal is output by the 8051's data port, and latches to the output ports Q0, Q1 and Q2 by three-state latcher 74LS373 to control the working process of the AD574A. Figure. AD574A interface circuit AD converter's output data connects to the 8051 by P0 data bus, because we only use the 8-bit data port, so the 12-bit data reads into 8051 twice, so we connect it to the ground. When 8051's p3.0 inquires the STS port conversion end signal, the circuit will read the 12-bit A/D data's high 8-bit into 8051 first, then the low 4-bit.   (View)

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Operational Amplifier Power Output Circuit

Published:2011/5/17 8:41:00 Author:Robert | Keyword: Operational Amplifier, Power Output

The Operational Amplifier Power Output Circuit is shown below.   (View)

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Detection 4 ~ 20mA loop instrument amplifier (ISO120,XTR101)circuit diagram

Published:2011/5/16 20:43:00 Author:Ecco | Keyword: Detection , 4mA, 20mA, loop instrument , amplifier

The RTDs isolated detection 4 ~ 20mA loop instrument amplifier circuit composed of ISO120 and INA105, XTR101 instrumentation amplifier is shown as the chart. Resistance temperature detector (RTD) can test temperature changing, the temperature changing can be changed into electrical signals which is input current loop amplifier XTR101, XTR101 transforms it into the 4 ~ 20mA current output, and the 4 ~ 20mA current is changed into voltage signal on the resistor RL by the twisted pair wires passing, and then amplified by the INA105 and sent to the isolation amplifier ISO120, and then it is isolated, amplified and output by ISO120. The main feature of the circuit is that the circuit uses XTR101 to transforme the input into 4 ~ 20mA current, the current signal can be transmitted in long distance, and it is not easy to get interference.   (View)

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Testing 4 ~ 20mA loop equipment amplifier (ISO122P/124, XTR101, RCV420) circuit diagram

Published:2011/5/17 2:33:00 Author:Ecco | Keyword: testing, 4 ~ 20mA, loop equipment , amplifier

The RTDs isolated detection 4 ~ 20mA loop instrument amplifier circuit composed of ISO122P／124 and loop current transmission circuit XTR101, the loop current receiver circuit CV420 is shown as the chart. Resistance temperature detector (RTD) can test temperature changing, the temperature changing can be transformed into electrical signals input by XTR101, and then it is changed into the 4 ~ 20mA current output by XTR101, and then it transfered by the twisted pair and received by RCV420 , then the 4 ~ 20mA current is changed into voltage signal, the voltage signal is amplified and sent to isolation amplifier ISO122P, amplified, isolated by the ISO122P and it outputs 0 ~ 5V voltage.   (View)

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EGC right leg drive amplifier circuit diagram with defibrillator shock protection and calibrator

Published:2011/5/17 3:00:00 Author:Ecco | Keyword: EGC, right leg , drive amplifier , defibrillator shock protection , calibrator

EGC right leg drive amplifier circuit with defibrillator shock protection and calibrator composed of INA102 and ISO106 is shown as the chart. The circuit has three ganged SPDT switches, the switch being connected to the calibration shows calibration state, the on shows the circuit being in measured state. When the circuit is in the measurement state, the output signal of left and right arm is amplified by INA102 and sent to the ISO106, and it is isolated, amplified and output by by ISO106. The output signal of of op amp OPA121 is the drive signal of right leg. When the circuit is in the calibration state, 5V reference voltage is divided by 5MΩ and 1kΩ resistors, it attenuates 5000 times.   (View)

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MAX4188/4189/4190 current-feedback amplifier circuit diagram with high-speed banned mode

Published:2011/5/17 3:09:00 Author:Ecco | Keyword: current-feedback , amplifier, high-speed , banned mode

MAX4188/4189/4190 low-power current feedback amplifier has the low conversion transient state and high-speed enable / disable time. Three pieces of MAX4188 and single MAX4190 have closed-loop gain with +2 (6dB) or greater compensation to provide 200MHz-3dB bandwidth and 185MHz bandwidth respectively. Three pieces of MAX4189has closed-loop gain with +1 (0dB) or greater compensation to provide 250MHz-3dB bandwidth. The 0.1dB gain flatness of these amplifiers can reach 80MHz, differential gain is 0.03% and phase error is 0.055, all of these features make it be an ideal choice for video applications.   (View)

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High input impedance in-phase differential amplifier circuit composed of OP200

Published:2011/5/16 10:02:00 Author:Rebekka | Keyword: High input impedance, in-phase differential amplifier

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Automatic zeroing amplifier circuit composed of OPA2111BM

Published:2011/5/16 9:52:00 Author:Rebekka | Keyword: Automatic zeroing amplifier

Automatic zeroing amplifier circuit is shown as above. OPA2111 low bias (≤ ± 4pA), its setting up time is very short (1μs established to 0.01% accuracy), the noise is very small (8nV / (Hz) 1 / 2, 10kHz). It passes the automatic zeroing set can keep the offset voltage less than 5μV. Zero drift ≤ 0.028μV / C, converting to the input terminal and the zero potential regulation rate is ≤ 2μV / s. If you appropriately reduce the integration capacitor C, the zero potential adjusting speed can be improved. The voltage amplification factor is Av =- RF/R1 =- 100.   (View)

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ISO100 optocoupler linear isolated amplifier circuit diagram

Published:2011/5/17 2:51:00 Author:Ecco | Keyword: optocoupler , linear , isolated amplifier

ISO100 is the optocoupler isolation amplifier. It uses LED to produce coupling light, and the negative feedback of coupling light is added to the input end, while the measures on output end of forward transmission can achieve a high precision, linear and long temperature stability. The fine matching coupler and amplifier laser correction ensure the integration of its excellent adjustment performance and low offset error. ISO100 can be used as a current - voltage converter, there is 750V (2500V test voltage) voltage between the input and output ends, it effectively disconnects the the contact of the public current between input and output ends with ultra-low leakage current, the maximum leakage current is 0.3μA when the current is at 240V, 60Hz.   (View)

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