Posts Tagged ‘Signal Conditioner’
Buffer amplifier is required by a typical pH probe to isolate its 10^6 to 10^9 ohm source resistance from external circuitry. Such an amplifier is shown in the following figure.
The voltage error produced by the bias current and electrode resistance is minimized by the low input current of the AD795JR. To minimize leakage, we have …
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The heart of an average reading, rms calibrated AC voltmeter is shown in figure below. It’s a rectifier and averaging filter. We can remove the averaging function and provide a precision full-wave rectifier by deleting C2 and provide an absolute value generator by deleting C1.
By following the signal path for negative and then for positive …
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Digitizing transducer interface output voltage is shown on circuit diagram below. The transducer in this case is the NE5521, an LVDT (Linear Variable Differential Transformer) Signal Conditioner. To ensure that the input to the A/D does not go excessively beyond the supply voltage of the A/D, this device is use the diode at the A/D …
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Magnetic transducer is usually found in pulse counting application, and we can use this circuit to amplify and convert the signal from the transducer. Here is the schematic diagram of the signal conditioning circuit:
[Source: National Semiconductor Application Note]
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This is a differentiator circuit. This circuit can be used to do differential operation. There are two differentiator, the are true differentiator and practical differentiator. The true differentiator is extremely susceptible to high frequency noise due to the increasing AC gain at the rate of 6 dB per octave. Here is the circuit of true …
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This is a circuit of difference amplifier. This circuit is an inverting amplifier that allows the subtraction of two voltages and that is the summing amplifier’s complement.This circuit also allows the the cancellation of a signal common to the two inputs.This circuit can be used as a computational amplifier, in in rejecting a common mode …
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