Since the open-loop gain of an op-amp is extremely large, a small differential input signal would drive the output of the amplifier to one rail or the other in the absence of negative feedback.
22.
An ideal op-amp amplifies the differential input; if this input is 0 volts ( i . e . both inputs are at the same voltage with respect to ground ), the output should be zero.
23.
These additions make two substantial improvements to the OTA . First, when used with input resistors, the diodes distort the differential input voltage to offset a significant amount of input stage non linearity at higher differential input voltages.
24.
These additions make two substantial improvements to the OTA . First, when used with input resistors, the diodes distort the differential input voltage to offset a significant amount of input stage non linearity at higher differential input voltages.
25.
The exposed pads allow for a range of analogue signal conditioning circuits like band-pass filters, anti-alias filters, charge amplifiers, integrators / differentiators,'instrumentation'high-gain differential inputs, and other.
26.
The "'operational transconductance amplifier "'( "'OTA "') is an amplifier whose differential input voltage produces an output impedance differential input stage and that it may be used with negative feedback.
27.
The "'operational transconductance amplifier "'( "'OTA "') is an amplifier whose differential input voltage produces an output impedance differential input stage and that it may be used with negative feedback.
28.
The LM13700 is like a standard op-amp : each has a pair of differential inputs and a single output, but an OTA is voltage in and current out rather than voltage in and voltage out; and OTAs are programmable via the IABC pin.
29.
;Finite input impedances : The " differential input impedance " of the operational amplifier is defined as the impedance " between " its two inputs; the " common-mode input impedance " is the impedance from each input to ground.
30.
That is, using the diodes, the signal distortion level at 80 mV of differential input is the same as that of the simple differential amplifier at a differential input of 20 mV . Second, the action of the biased diodes offsets much of the temperature sensitivity of the OTA's transconductance.
