Bridge Amplifier Module
Functional Description
Brief Description: This module provides an voltage output to a floating load and provides a gain on the output.
The schematic of a typical Bridge Amplifier is presented below. To enlarge the schematic, click on it.
This schematic gives an example of a circuit for a High-Voltage Bridge Amplifier. This circuit shown here shows a high-voltage bridge drive to a floating load with a gain of 22.
Front Panel
Inputs:
One input (V1) is applied by the Cannon receptacle on the front panel.
Outputs:
One output channel are provided on the output. The output provided here is unfiltered.
Offset:
The offset gain trim can be manually adjusted by the user as required.
Circuit Diagram
Bridge Amplifier Module
Schematic
Operation
The desired voltage is input to this module via the Cannon receptacle on the front panel. The resulting output voltage can be amplified or attenuated as required by the user.
Gain Setting
To set the gain of this module, adjust the gain-trim to obtain the desired output value.
List of Components
· 1 2B31J Analog Device
· +/- 10% Resistors
· 1 MS3101F14S-5S Cannon receptacle
Functional Specifications
This module requires +/- 15 Volt power supply to operate. The input should be limited to approximately +/- 1 Volt.
The Phase characteristics of this module are:
0-10 degree phase shift from 0.1 Hz to 20 kHz; after 20 kHz there is a 90 degree phase shift.
The Gain characteristics of this module are:
The gain is optimally flat from 0.1 Hz to 20 kHz; after 20 kHz there is a 20 dB/decade rolloff.
The Noise characteristics of this module are:
There is a -85 dB SNR 0.1 Hz to 15 kHz; after 15 kHz the SNR increases slightly to about -70 dB.
The Output Gains produced by this module are:
1 to 10,000. Since the power supply voltage is +/- 15 Volts the user needs to ensure that the gain setting is adjusted so that the device is still operating within the linear range.
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