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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
Full-Bridge Load Current Monitor - The LT1990 is a micropower precision difference amplifier with a very high common mode input voltage range. It has pin selectable gains of 1 or 10. The LT1990 operates over a ±250V common mode voltage range on a ±15V supply. The inputs are fault protected from common mode voltage transients up to ±350V and differential voltages __ Linear Technology/Analog Devices App Note, Apr 5th 2010
Gain 1000 Amplifier with 0.01% Accuracy, DC to 5Hz - With a typical open loop gain value of 20 million V/V, very high closed loop gain amplifiers can be implemented with remarkable accuracy. Even with such a high gain, the trimmed precision produces a dc output offset of only 20mV. __ Linear Technology/Analog Devices App Note, Jun 21st 2011
General Purpose Arithmetic Block - This is the circuit for the general purpose arithmatic function, an Analog Computer block which solves the equation VO = (V1V2 + V3) ((RF + RG) /RG) in real time. No A/D conversions or software needed! __ Linear Technology/Analog Devices App Note, Jul 2, 2012
Ground Referred Precision Current Sources - The zero drift LTC2054 instrumentation amplifier can be used in conjunction with one of Linear Technology's precision, low temperature drift shunt voltage references (in this example the LT1634) to create a precision, ground referred current source. __ Linear Technology/Analog Devices App Note, Mar 30th 2010
Hall Sensor Amplifier Optimizes Sensitivity vs Supply Current - Voltage across HALL-ELEMENT bridge is reduced to minimize bridge current from 2.5mA or 230µA then a dual LT6011 DC precision low current low drift and Vos OP AMP is used in an instrumentation AMP configuration at a gain of 101 to give a sensitivity of 40mV/mT. __ Linear Technology/Analog Devices App Note, Jul 2, 2012
HD Video Cable Driver using Economical LT6559 - Single supply 5V HD Video Cable Driver with two resistors setting common voltage on capacitive coupled input. Two 270pF takes care of 10MHz filtering. This circuit depicts one of three channels. __ Linear Technology/Analog Devices App Note, Jul 2, 2012
High Accuracy Oxygen Sensor - High Accuracy Oxygen Sensor. Accuracy is achieved using a transimpedance approach. Reduction in noise gain gives a reduction in output offset error from 50mv to 500µa. __ Linear Technology/Analog Devices App Note, Jul 2, 2012
High Linearity Components Simplify Direct Conversion Receiver Designs - LT5575 Demodulator with 20MHz Low pass Filter, common mode output voltage can be set regardless of input voltage. A filter at the output of the demodulator filters out of band signal and the filter at the inputs of the ADC performs the anti aliasing function. __ Linear Technology/Analog Devices App Note, Jul 2, 2012
High Performance Op Amps Deliver Precision Waveform Synthesis - DN306 Design Notes __ Linear Technology/Analog Devices
High Resolution Battery-Powered Robust Type K Thermocouple Signal Conditioning Amplifier with Cold Junction Compensation - The circuit is used as a plug-in adapter for common digital multimeters and is completely portable. This circuit employs the LT1025 thermocouple compensator to improve accuracy over a wide range of ambient conditions and is mounted close to the thermocouple connection points for optimal thermal tracking. It precludes the need __ Linear Technology/Analog Devices App Note, Apr 8th 2010
High-Speed Op Amp Enables IR-Proximity Sensing - 06-Aug-09 EDN-Design Ideas IR (infrared]-proximity sensors can sense the presence of an object, its distance from a reference, or both. Applications include speed detection, sensing of the hand in automatic faucets, automatic counting or detection of objects Design by Arpit Mehta, Maxim Integrated Products Inc, Sunnyvale, CA
Humidty Sensor to Data Aquisition System Interface - The circuit shown in the schematic features zero drift operational amplifiers (LTC1250 and LTC1050) and a precision instrumentation switched capacitor block (LTC1043). This design will maintain excellent DC accuracy down to microvolt levels. This method was chosen over the use of a true RMS-to-DC or log converter because of __ Linear Technology/Analog Devices App Note, Mar 16th 2011
IF/RF Gain Block State-of-the-Art Performance the Easy Way - Bandwidth has become more precious than gold. As we push more and more data wirelessly through our smartphones, tablets, GPS, and video players, the spectrum has become more crowded. Increasingly complex and efficient modulation schemes allow us to carry more MBits/mHz through the air. However, the key to these demanding __ Linear Technology/Analog Devices App Note, Greg Fung-Senior Design Engineer Oct 4th 2012
i-Feedback Amplifier Puts Parasites to work - 11/09/95 EDN-Design Ideas Many an engineer designing with wideband op amps has battled parasitic capacitance at the inverting input. What’s more, if you design a discrete gain-select circuit, you must deal with declining amplifier performance at higher gain levels. The circuit in Figure 1, using a CLC404 wideband current-feedback amplifier, controls the parasitic capacitance to maintain performance in a discrete gain-select configuration. Design by Comlinear Corp Fort Collins, CO
Ignore Input Range Limits in Wideband OpAmp - 07/16/98 EDN-Design Ideas (This file has many circuits, plase scroll to this one) Most of the recent wideband, single-supply op amps use a voltage-feedback design. The error signal(differential input voltage] for a voltage-feedback op amp can operate over a range of common-mode input voltages, and its common-emitter output stage can provide output voltages near the supply rails. Current-feedback op amps are becoming available with wide output swings,e Design by Michael Steffes, Burr-Brown Corp, Tuscon, AZ
Implementing a Low Cost, Battery Powered, TDS Meter using MCU & psoc - One of the common method in determining the quality of water is the measurement of Total Dissolved Solids (TDS). TDS meter is a widely
Improved 3 Transistor Audio Amp (80 milliwatt) - This circuit is similar to the one above but uses positive feedback to get a little more amplitude to the speaker. I copied it from a small 5 transistor radio that uses a 25 ohm speaker. In the circuit above, the load resistor for the driver transistor is tied directly to the + supply. This has a disadvantage __ Designed by Bill Bowden
Industrial-Grade Digital Potentiometer 09/20/01 EDN-Design Ideas Both ac and dc motors in modern industrial systems often receive their control from PLCs (programmable-logic controllers] in a control room safely away from the process. If an operator must manually set the motor speed while observi Design by Phill Leyva, Maxim Integrated Products, Sunnyvale, CA
Infrared Remote Control Timer - The circuit comprises two sections, namely, the transmitter section and the receiver section. Fig.1 shows the IR transmitter section. The astable multivibrator NE555 (IC1) is used to generate a 10kHz __ Electronics Projects for You
Instrumentation Amp makes noninverting integrator - 09/19/02 EDN-Design Ideas Figure 1a shows the classic implementation of an integrator. The circuit has two properties that may be undesirable in same applications It necessarily inverts, and it requires a split-supply or midsupply reference. Figure 1b shows an implementation of an integrator that uses an LT1789 instrumentation amplifier Design by Glen Brisebois, Linear Technology Corp, Milpitas, CA
Instrumentation Amp Swings Rail-To-Rail - 03/03/94 EDN-Design Ideas You can combine an instrumentation amplifier and an inexpensive CMOS
op amp to get the better of two worlds the precision of a bipolar instrumentation amp and the5V single-supply operation of the CMOS
op amp. The characteristics of such a circuit Design by R Mark Stitt, Burr-Brown, Tucson, AZ
Integrator forms picoammeter - 07/17/97 EDN-Design Ideas The analog circuitry necessary to precisely resolve picoamperes can challenge even the best designer. At these minute current levels, noisy and nonreproducible circuit topologies are common. A current-to-voltage (I/V) converter that uses an op amp and large feedback resistor is the obvious first design choice to acquire a small current. However, the component errors that this method induces can swamp the measurable current (and can amount to throwing out the baby with the bath water). Design by Clayton B Grantham, Burr-Brown Corp, Tucson, AZ
Inverting Switched Capacitor Integrator - Circuit Ideas for Designers App Note __ Advanced Linear Devices, Inc
Keep the heat down in power op Amps - 02/15/00 EDN-Design Ideas When you include a power op amp, such as PA05 from Apex Microtechnology, in your design, it is desirable to minimize the supply-to-output differential to a minimum to reduce power dissipation and to fully exploit the amplifier's output range. Our goal was to design a power amplifier to yield 70V p-p output at Design by Vijay Damle
Kelvin-Sensed Temperature Sensor Amplifier for –50°C to 150°C Platinum RTD from 10V Reference - The LT1012 is an internally compensated universal precision operational amplifier which can be used in practically all precision applications. The LT1012 combines picoampere bias currents (which are maintained over the full –55°C to 125°C temperature range) , microvolt offset voltage (and low drift with time and temperature) , __ Linear Technology/Analog Devices App Note, Mar 29th 2010
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