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Chopper Circuits
Last Updated on:
Saturday, August 30, 2014 10:27 AM


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

AN-609: Chopping on Sigma-Delta ADCs -  AN-609 Analog Devices Application Notes  (app note added 6/06)  Chopping is a technique that can be used to cancel offset voltages and or low frequency errors.  This Application Note outlines how chopping is implemented on  AD7708/AD7718,AD7709,AD7719,AD7782/AD7783 high resolution Sigma-Delta ADCs and discusses  resulting benefits it brings.
AN-79: IC PreAmplifier Challenges Choppers on Drift -  National Semiconductor Application Note  (app note added 6/06)
Application Considerations & Circuits for a New Chopper-Stabilized Op Amp -  AN9 Linear Technology A discussion of circuit, layout and construction considerations for low level DC circuits includes error analysis of solder, wire and connector junctions. Applications include sub-microvolt instrumentation and isolation amplifiers, stabilized buffers and comparators and precision data converters.
Chop the noise gain to measure an op amp's real time offset voltage -  3-Apr-08 Issue of EDN  A new method of chopping input noise allows you to measure an op amp's offset voltage in real time.... [Design Idea by Glen Brisebois, Linear Technology, San Jose, CA]
Chopped Amplifier Exacts only 5 µA -  05/22/97 EDN-Design Ideas  [Design Idea added 3/03] EDN is migrating links. This link is not verified.  Search the "title" EDN for new link.

Chopper Amplifiers Complement a DC Accurate Low-Pass Filter -  DN9  Design Notes (Linear Technology) (app note added 6/06)
Chopper stabilized amplifier cascade yields 160 to 10,240 programmable gain -  23-Nov-06 Issue of EDN  Amplify microvolt-level signals with a minimal-component-count circuit.... [Design Idea by Jerome E Johnston, Cirrus Logic Corp, Austin, TX; Edited by Brad Thompson and Fran Granville]
Chopping on Sigma-Delta ADCs -  AN-609 Analog Devices Application Notes  (app note added 6/06)  Chopping is a technique that can be used to cancel offset voltages and other low frequency errors.  This Application Note outlines how chopping is implemented on the AD7708/AD7718,AD7709,AD7719,AD7782/AD7783 high resolution Sigma-Delta ADCs and discusses the resulting benefits it brings.
Chopping Reduces Reference’s Supply Current -  04/10/97 EDN-Design Ideas  The 10V precision reference, IC3, in Figure 1 has temperature drift of approximately 0.6 ppm/�C and good long-term stability. However, because of its zener-based design, this reference needs more than 4 mA of supply current. To reduce this current, the circuit in Figure 1  supplies the reference with chopped power.  This scheme lowers the mean supply.... [Design Idea by Hartmut Henkel, von Hoerner & Sulger GmbH, Schwetzingen, Germany]
IC PreAmplifier Challenges Choppers on Drift -  National Semiconductor Application Note  (app note added 6/06)
Signal Chopping Enhances Bridge Performance -  06/22/95 EDN-Design Ideas  [Design Idea added 3/03] EDN is migrating links. This link is not verified.  Google the "title" EDN for new link.
Ultra Low Noise Op Amp Combines Chopper & Bipolar Op Amps -  DN36  Design Notes (Linear Technology) (app note added 2/06)


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