# Solutions Search - LT1058 - Dual and Quad, JFET Input Precision High Speed Op Amps

## Low Noise, Wideband, Gain = 100 Amplifi er with High Input Impedance

Jan 1st 1987

Averaging of three identical input stages reduces random noise addition by √3. Each input stage has a gain of about 10.2, and the second stage adder is trimmed for an accurate overall 100x. ...

## Bipolar Input (AC) V/F Converter

Jan 1st 1987

Input integrator uses precision full-wave rectifier for an absolute-value integration charge. Since not ground referenced, the integration ramp is sensed by a diff amp structure that drives the V/F output comparator. A simple comparison forms a sign bit. ...

## Current Output, High Speed, High Input Impedance Instrumentation Amplifi er

Jan 1st 1987

This is a variation on the standard 3-stage implementation of an Instrumentation Amplifier function. The output sense resistor, along with the extra op amp for feedback sensing, form a Howland current-source structure for generating precision output current. ...

## Wideband, High Input Impedance, Gain = 1000 Amplifi er

Jan 1st 1987

The gain is distributed equally between four amplifier sections in cascade, so the gain of each section is about 5.6. Distributing the gain uniformly provides the best bandwidth. Trimming of the final stage corrects for resistor variances so that overall gain is 1000x. ...

## Instrumentation Amplifier with Shield Driver

Jan 1st 1987

This is a variation on the standard 3-stage implementation of an Instrumentation Amplifier function. The gain resistor structure between the input op amps provides a mid-point potential that represents the average of the incoming signals. The average level is buffered and back-drives the shields of the signals so there are minimal ...