This circuit utilizes a rail-to-rail operational amplifier with high slew rate to act as a rail-to-rail voltage comparator. The input reference level is adjusted from V+ rail to ground via a single potentiometer. Note that this input reference level is ratiometric with the supply voltage. Alternatively, this potentiometer can be replaced with any fixed reference signal generated externally. The output changes state whenever the input signal VIN at the "input terminal crosses the reference

This circuit utilizes an operational amplifier with relatively high slew rate per unit power consumption configured as a band-pass filter circuit. The input is ac coupled with the low frequency cutoff point determined by R1C1. The feedback network cutoff at a high frequency determined by R2C2. Start the operational amplifier selection process by determining a) the available voltage supplies; b) the high frequency response time required; c) the offset voltages required. An operational amplifier w

This circuit presents a low voltage instrumentation amplifier operating on +/-1V power supplies. This circuit is designed to amplify low level difference-mode signals over a common mode voltage range that may be relatively large compared to the signal voltage levels. Many transducer and bridge circuits that generate limited output voltages can be buffered and amplifier by using this low voltage instrumentation amplifier. In this amplifier, the circuit functions as a difference amplifier with hig

This circuit generates a precision linear ramp from "5V to +5V that could be stopped within 1mV of the DUT (device under test) desired output. The DUT in this example is the ALD1108 MOSFET. The VGS voltage of this device is defined as that gate voltage at which the drain current is 1µA and the drain voltage is at 100mV. The challenge in this case is to measure that gate voltage VGS at which VDS=100mV and drain current IDS=1µA simultaneously. This is accomplished by using a precision curre