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Amplifier Circuits:  Operational
Operational Amplifiers:  #'s - A        B - C      D - K       L - N       O       P - S        T - Z 


Amplifier -- Main Page
 

Last Updated: October 24, 2017 02:54 PM

 
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A 133MHz Differential Amplifier with External Gain Set, Impedance Matching to a 75Ω Source & Level Shifting -  Complete single ended 75Ω input impedance to differential out, level shifting 2.5V input to 1.25V differential common mode, single ended to differential gain of 2 using external resistors circuit example. __ Linear Technology/Analog Devices App Note, Oct 3, 2012

A Fourth-Order Speech Filter (Based On Texas Instruments Application Note) -  Human speech generally occupies an audio spectrum of 300 to 3400 Hz.  There is a requirement, especially in telephone circuits, to limit the frequency response to this range.  The ‘Digital Speech __ Electronics Projects for You

A Self-Powered Op Amp Creates a Low-Leakage Rectifier -  10/20/11  EDN-Design Ideas An amplifier that works at 0.8V is key.  You can combine a carefully chosen op amp, a low-threshold P-channel MOSFET, and two feedback resistors to make a rectifier circuit with less forward drop than a diode   (Figure 1).  The rectified output voltage powers the active circuitry, so no additional power supply is necessary. __ Circuit Design by Martin Tomasz, Sageloop Designs, San Francisco, CA

A true op-amp made from inverters -  11/18/13  EDN-Design Ideas Designs that stretch parts beyond their intended use, like this true op-amp constructed from eight CMOS inverters, have a certain special appeal __ Circuit Design by Colin Weltin-Wu

Accelerometer Amplifier with DC Servo -  The feedback integrator amplifies the 100 Megohm feedback resistance to behave like about 1Gigohm, extending the low-frequency response downward by about an order of magnitude. __ Linear Technology/Analog Devices App Note, Jun 21st 2011

Accelerometer Signal Conditioner -  A piezoelectric accelerometer responds to any physical movement by generating a charge proportional to the acceleration of the movement.  This sensor has a capacitance of 750pF which produces a charge of 60pC per g of gravitational force.  This charge is transferred to the 1000pF feedback capacitor for an output of 60mV/g. __ Linear Technology/Analog Devices App Note, Mar 16th 2010

Active 2nd Order Filters -  The figures below illustrate using opamps as active 2nd order filters.  Three 2nd order filters are shown, low pass, high pass, and bandpass.  Each of these filters will attenuate frequencies outside their paSSBand at a rate of 12dB per octave or 1/4 the voltage amplitude for each octave of frequency increase or decrease outside the paSSBand __ Designed by Bill Bowden

Amplifier requires no DC bias -  03/16/00 EDN-Design Ideas Intrinsically capacitive transducers and or high-impedance signal sources usually require ac coupling and a buffer amplifier to condition  signal for furr processing.  Buffers take many forms, but most of m compromise signal quality through __ Circuit Design by John Guy, Maxim Integrated Products, Sunnyvale, CA

Amplifiers Deliver Accurate Complementary Voltages -  09/23/10 EDN-Design Ideas Two amplifiers produce voltages that you can use in a variety of applications. __ Circuit Design by Marián Štofka, Slovak University of Technology, Bratislava, Slovakia

Amplify & Shift EPAD MOSFET Output with an Operational Amplifier -  Circuit Ideas for Designers App Note __ Advanced Linear Devices, Inc

An LT1013 & LT1014 Op Amp SPICE Macromodel -  DN12 Design Notes __ Linear Technology/Analog Devices

An Op-Amp based battery voltage Monitor -  An ECU must have a way to monitor battery voltage.  Here is a simple op-amp based circuit which will illuminate the LED when the battery voltage drops to a certain level.  The turn-on point is set with R2.  You must be able to vary Vcc   (usually with a good power supply) to set the circuit.  Decide at what voltage you'd like the LED to illuminate, and apply this at Vcc.  Adjust R2 until the light just illuminates.  Use an LED which will light at the desired voltage level, and determine R3, using ohm's law   (E=IR), to keep the current flowing through the LED and op-amp to around 10mA. 

AN10Methods for Measuring Op Amp Settling Time -  Linear Technology AN10 __ Designed by Jim WilliamsJul 1st, 1985

AN6Applications of New Precision Op Amps -  Linear Technology AN6 __ Designed by Jim WilliamsJan 1st, 1985

AN9Application Considerations and Circuits for a New Chopper-Stabilized Op Amp -  Linear Technology AN9 __ Designed by Jim WilliamsAug 5th, 1986

Analog divider uses few components -  01/04/07 EDN-Design Ideas Low-cost op amp, CMOS timer perform analog math __ Circuit Design by David Cripe, Chatham, IL

Analogue Components for IoT Applications -  Numerous analogue components and chips are introduced to the market every year, but what is influencing their evolution? Read on to find out the

Analogue difference Detector -  This is an example using a Norton op-amp: these work by using differential input current rather than the differential input voltage used by conventional op-amps. __ Designed by Richard Torrens

APD DC Coupled Current Monitor from 20V to 90V APD Bias -  APD current monitor that operates at High Common Mode Voltage and simplifies signal conditioning using instrumentation amplifier and a Delta Sigma ADC. __ Linear Technology/Analog Devices App Note, Apr 7th 2010

Application Considerations and Circuits for a New Chopper-Stabilized Op Amp -  Linear Technology AN9 __ Designed by Jim WilliamsAug 5th, 1986

Applications of New Precision Op Amps -  Linear Technology AN6 __ Designed by Jim WilliamsJan 1st, 1985

Applicatons of the LT1366 Rail-To-Rail Amplifier -  DN89 Design Notes __ Linear Technology/Analog Devices

Audio equalizer features transimpedance Q enhancement topology -  6-Mar-08 EDN-Design Ideas A novel op-amp configuration enables a graphic equalizer with a minimal number of amplifiers __ Circuit Design by Herminio Martínez, Encarna García, and Eva Vidal, Technical University of Catalonia, Barcelona, Spain

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