Schematics > Test and measurement > Voltage follower with 1G ohm input resistance
Voltage follower with 1G ohm input resistance
This circuit uses an LM11 to form a voltage follower with 1G ohm input
resistance built using standard resistor values. With the input disconnected,
the input offset voltage is multiplied by the same factor as R2; but the added
error is small because the offset voltage of the LM11 is so low. When the input
is connected to a source less than 1G ohm, this error is reduced. For an ac-coupled
input a second 10M resistor could be connected in series with the inverting
input to virtually eliminate bias current error; bypassing it would give minimal
noise.
Title: Voltage follower with 1G ohm input resistance
Source: National Semiconductor
Published on: 2005-02-10
Reads: 218
Print version:  Other schematics from Test and measurement
Zener Diode Tester XTal Tester High Resistance Voltmeter IR Remote Control Tester Picoammeter circuit with 4 ranges Led display digital Voltmeter Mosfet TESTER 12V Lead-Acid Battery Monitor A simple Remote control Tester Voltage Monitor
Schematics > Test and measurement > Voltage follower with 1G ohm input resistance | 
Home
