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The input offset voltage is a parameter defining the differential DC voltage required between the inputs of an amplifier, especially an operational amplifier (op-amp), to make the output zero (for voltage amplifiers, 0 volts with respect to ground or between differential outputs, depending on the output type).
Referring to the above diagram, if the op-amp is assumed to be ideal, then the voltage at the inverting (-) input is held equal to the voltage at the non-inverting (+) input as a virtual ground. The input voltage passes a current V in / R 1 {\displaystyle V_{\text{in}}/{R_{1}}} through the resistor producing a compensating current flow through ...
Slewing is associated with the large-signal performance of an op amp. Consider, for example, an op amp configured for a gain of 10. Let the input be a 1 V, 100 kHz sawtooth wave. That is, the amplitude is 1 V and the period is 10 microseconds. Accordingly, the rate of change (i.e., the slope) of the input is 0.1 V per microsecond.
where V in+ is the voltage at the non-inverting input, V in− is the voltage at the inverting input and g m is the transconductance of the amplifier. If the load is just a resistance of R load {\displaystyle R_{\text{load}}} to ground, the OTA's output voltage is the product of its output current and its load resistance:
In its simplest form a transimpedance amplifier has just a large valued feedback resistor, R f. The gain of the amplifier is set by this resistor and because the amplifier is in an inverting configuration, has a value of -R f. There are several different configurations of transimpedance amplifiers, each suited to a particular application.
Download QR code; In other projects Appearance. move to sidebar hide ... A circuit diagram of a inverting amplifier made using an operational amplifier.
Schematic symbol for an OTA has inverting (V in-) and noninverting (V in+) inputs, power supply lines (V + and V −), two biasing inputs (I abc and I bias), and a single output current I out. The LM13700 is an integrated circuit (IC) containing two current -controlled operational transconductance amplifiers (OTA), each having differential ...
The current-feedback operational amplifier (CFOA or CFA) is a type of electronic amplifier whose inverting input is sensitive to current, rather than to voltage as in a conventional voltage-feedback operational amplifier (VFA). The CFA was invented by David Nelson at Comlinear Corporation, and first sold in 1982 as a hybrid amplifier, the CLC103.