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Another circuit for those seeking Design inspiration. Here's a Design Idea freshly uploaded to the site - Digitally programmable instrumentation amplifier offers autozeroing (click on the circuit diagram to expand it).
As the title suggests, it is a circuit for a digitally programmable amplifier that offers autozeroing.
The Design Idea begins:
As the title suggests, it is a circuit for a digitally programmable amplifier that offers autozeroing.
The Design Idea begins:
The current trend in advanced instrumentation amps is to use no external resistors. In these amplifiers, a gain-control word, comprising a binary-coded one, sets the voltage gain. Several integer gains within one to 1000 are currently available; however, this range does not yet include a gain of three.
Although external-resistor-free amplifiers with a gain of three are available, they are neither instrumentation amps nor autozeroed devices (Reference 1). These features are essential in applications requiring accurate processing of low-level voltages. You can use the circuit in Figure 1 for applications requiring instrumentation amps having voltage gains of three or 10 and the ability to process voltages as low as 1 mV.Read the full Circuit Design Idea
It is courtesy of Marián Štofka of Slovak University of Technology, Bratislava, Slovakia.
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