Electronic Circuits and electronic circuits, electronic schematics plus an extensive resource for hobbyists, inventors and engineers

DiscoverCircuits.com, has 40,000+ electronic circuits, cross-referenced
into 500+ categories.    We have searched the web to help you find quick design ideas.
We make every effort to link to original material posted by the designer. 
Please let us if you would like us to link to or post your design.

HOME Schematics Index Hobby Corner Dave's Circuits Electronic Resources Contact Info
Imagineering Ezine    Discover Solar Energy Dave Johnson & Associates Faraday Touch Switches

Precision Amplifier Circuits
Precision Amplifiers:   #-O      P-Z
Last Updated on:
Thursday, April 07, 2016 02:04 PM

 
Links to electronic circuits, electronic schematics, designs for engineers, hobbyists, students & inventors:

 

1Hz to 100MHz Voltage to Frequency Converter Has 160dB Dynamic Range, Runs from 5V Supply -  This circuit achieves a wider dynamic range and higher output frequency than any commercially available voltage to frequency (V→F) converter. Its 100MHz full scale output (10% over range to 110MHz is provided) is at least ten times faster than available units. The circuits 160dB dynamic range (8 decades) allows continuous . . .  [Linear Technology App Note - , Mar 25th 2010]

 

20-Bit, Linear, Low Noise, Precision, Bipolar 10V DC Voltage Source  -  The maximum errors occur at DAC code zero (zero-scale error) and DAC code 1, 048, 575 (full-scale error). The noise contribution from each voltage reference path is attenuated by the DAC when mid-scale code is selected. , Circuit Description , A real application, however, will not have a high-pass cutoff at 0. 1 Hz to attenuate 1/f noise but will include frequencies down to dc in its pass band; therefore, the measured peak-to-peak noise will be more realistically as shown in Figure 6. . . .  [Analog Devices-Circuits from the Lab]

20-Bit, Linear, Low Noise, Precision, Unipolar +10 V DC Voltage Source  -  The noise contribution from each voltage reference path is attenuated by the DAC when the zero-scale code is selected. , Circuit Description, As the time period over which the measurement is taken is increased, lower frequencies will be included, and the peak-topeak value will increase. The AD8676 is a dual version of the AD8675 op Amp and can be used in the circuit if desired. , Equipment Required , Bullet text, Software Installation The AD5790 evaluation kit includes self-installing software on a CD. The software is compatible with Windows XP (SP2) and Vista (32-bit and 64-bit). If the setup file does not run automatically, you can run the setup. exe file from the CD. Install the evaluation software before connecting the evaluation board and SDP board to the USB port of the PC to ensure that the evaluation system is correctly recognized when connected to the PC. , After installation from the CD is complete, power up the AD5790 evaluation board as described in the Powe. . .  [Analog Devices-Circuits from the Lab]

 

3-V Precision Op Amps from Analog Devices -  Analog Devices-Analog Dialogue. . .  [by Buxton, Joe]

 

50MHz Thermistor RMS to DC Converter Using 5V Supply -  The LT1014 is the first precision quad operational Amplifier which directly upgrades designs in the industry standard 14-pin DIP LM324/LM348/OP-11/4156 pin configuration. It is no longer necessary to compromise specifications, while saving board space and cost, as compared to single operational Amplifiers. . . .  [Linear Technology App Note, Mar 30th 2010]

 

5V Powered, Linearized Platinum RTD 0C to 400C 0.05C Signal Conditioner -  The LT1014 is the first precision quad operational Amplifier which directly upgrades designs in the industry standard 14-pin DIP LM324/LM348/OP-11/4156 pin configuration. It is no longer necessary to compromise specifications, while saving board space and cost, as compared to single operational Amplifiers. . . .  [Linear Technology App Note - , Mar 29th 2010]

 

5V Powered, Quartz-Stabilized 10kHz Voltage to Frequency Converter has 0.0015% Linearity and 8ppm/C Temperature Coefficient -  Almost all precision voltage-to-frequency converters utilize charge pump based feedback for stability. These schemes rely on a capacitor for stability. A great deal of effort towards this approach has resulted in high performance V to F converters. Obtaining temperature coefficients below 100ppm/C requires careful attention . . .  [Linear Technology App Note - , Mar 25th 2010]

 

76V Over-the-Top Input Op Amp Combines Precision, Versatility and Protection  -  With the increased-use of electronics in automotive and industrial applications, the need for robust and highly reliable components is essential to ensure a proper functioning system with low maintenance costs. Automotive applications, for example have hostile environments where electronic components may be exposed to a variety . . .  [Linear Technology App Note - , Arnold Nordeng Design Engineer-Signal Conditioning Products Mar 20th 2013]

 

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 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 App Note - , Mar 16th 2010]

 

Battery Powered (Li-Ion) Platinum RTD Signal Conditioner with Curvature Correction -  The LT2078 is a micropower dual op Amp in 8-pin small outline, standard surface mount package, and LT2079 is a micropower quad op Amp offered in the standard 14-pin surface mount package. Both devices are optimized for single supply operation at 5V. 15V specifications are also provided. . . .  [Linear Technology App Note, Mar 30th 2010]

 

Dead Zone Generator -  BIPOLAR SYMMETRY IS EXCELLENT BECAUSE ONE DEVICE, Q2, SETS BOTH LIMITS. This circuit outputs 0V for a controlled range of input voltage. When the input voltage exceeds the set voltage in either polarity the output signal moves with unity gain. . . .  [Linear Technology App Note - , Jun 21st 2011]

 

Differential Bridge Amplifier with Gain Programmed through the Serial Interface and Analog to Digital Conversion (Standby Current Less than 100μA) -  The LTC6915 is a precision programmable gain instrumentation Amplifier. The gain can be programmed to 0, 1, 2, 4, 8, 16, 32, 64, 128, 256, 512, 1024, 2048, or 4096 through a parallel or serial interface. The CMRR is typically 125dB with a single 5V supply with any programmed gain. The offset is below 10μV with a temperature . . .  [Linear Technology App Note - , Apr 29th 2010]

 

Fast, 16-Bit Current Comparator -  Precision op-amp used as pre-comparator. Schottky diodes in feedback limit output swing of amplifier to minimize slew delay. Resistive input structure can be tailored for different trip points; this one detects a current sink of >50uA at the input. . .  [Linear Technology App Note - , Jun 21, 2011]

 

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 App Note - , Jun 21st 2011]

 

Kelvin-Sensed Temperature Sensor Amplifier for 50C to 150C 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 55C to 125C temperature range) , microvolt offset voltage (and low drift with time and temperature) , . . .  [Linear Technology App Note - , Mar 29th 2010]

 

Linear Thermometer -  T1 has a built in pair of thermistors with linearizing resistors custom scaled for a specific temperature range. , 0C to 100C in this example. The flying capacitor LTC1043 eliminates any dc loading on the precision network to maintain linearity over the entire temperature range. Amplifier gain is scaled to provide an output . . .  [Linear Technology App Note - , Jun 21st 2011]

 

Linearized Platinum Resistance Thermometer with 0.025C Accuracy Over 0 to 100C -  Platinum RTD's are typically driven with a constant current so that their resistance value directly translates to a temperature dependant voltage. Here the LT1001 and the LM129 create a constant current through the input 10K resistor which all flows through the sense resistor. A second Amplifier inverts the signal to provide . . .  [Linear Technology App Note - , Jun 21st 2011]

 

Low Power Comparator with <10uV Hysteresis -  The opamp is used as a precision comparator that drives an NPN transistor to form a logic-level output. Controlled positive feedback into a trim pin makes precision microvolt hysteresis control practical. . . .  [Linear Technology App Note - , Jun 21st 2011]

 

Low Side Current Sense -  Sensing the amount of current through a load on the low side has the disadvantage of raising the return connection to the load from ground. The advantage of such an approach is that it is very easy to implement using a basic non-inverting gain stage. The LTC6081 operates linearly down to ground also in this single supply example. . . .  [Linear Technology App Note - , Mar 16th 2010]

 

Matched Resistor Networks for Precision Amplifier Applications -  10/03/13  EDN Design Note   Two-quadrant multiplying DAC utilizes octal CMOS buffer. Some ideal op Amp configurations assume that the feedback resistors exhibit perfect matching. In practice, resistor non-idealities can affect various circuit parameters such as common mode rejection ratio (CMRR), harmonic distortion and stability. For instance, as shown in Figure 1, a single-ended Amplifier configured to level-shift a ground-referenced signal to a common mode of 2. 5V needs a good CMRR. Assuming 34dB CMRR and no input signal, this 2. 5V level shifter exhibits an output offset of 50mV, which can even overwhelm the LSB and offset errors of 12-bit ADCs and drivers. . . .  [by Tyler Hutchison, also see Linear Technology Design Note 502]

 

Micropower Thermocouple Signal Conditioner with Cold Junction Compensation -  A thermistor, shown as R3, is used to monitor the cold junction temperature. Its resistance becomes smaller as the cold junction temperature increases. An increase in cold junction temperature will reduce the output voltage of the Type J thermocouple by 52uV/C. The voltage reference and scaling of resistor values creates an . . .  [Linear Technology App Note - , Jun 21st 2011]


Precision Amplifiers:   #-O      P-Z


HOME Schematics Index Hobby Corner Dave's Circuits Electronic Resources Contact Info
Imagineering Ezine    Discover Solar Energy Dave Johnson & Associates Faraday Touch Switches


 About Us   |  Advertise on DiscoverCircuits.com   |   Report Broken Links  |    Link to DiscoverCircuits.com  |    Privacy Policy

Copyright  2002 - 2015 David A. Johnson & Associates.  All Rights reserved. 
 Linking is ALLOWED but COPYING any content or graphics to your web site is EXPRESSLY PROHIBITED.