Waveform amplifier is a very handy piece of equipment to have in the lab. Most function generator, pulse generator, and arbitrary waveform generator output voltage are limited to about 10V. Function generator output resistance is typically 50 ohm, making it not suitable driving low resistance (high current) load. For applications require higher voltage or higher current or both, a waveform power amplifier is required. For applications require to drive heavy load, the waveform output resistance must be very low (e.g. less than 1 ohm). Similarly some applications require to drive high capacitance, a laboratory power amplifier is needed. The TS200 and the TS250 are high voltage and high current amplifier for general laboratory and bench testing. It can output up to 65V (TS250-
Figure 1 shows the functional equivalent diagram of the TS200 lab amplifier. It features a selectable AC or DC coupled input. It also feature an adjustable DC offset voltage output which is useful for LDO PSRR and line transient response testing. Two versions of the TS200 are available, the A-
Figure 1. TS200 waveform amplifier functional equivalent circuit.
Figure 2 shows how to amplify a function generator to drive heavy load or large capacitance. It uses the TS200 wideband power amplifier. The function generator or pulse generator output is connected the TS200 modulation input. The TS200 output is connected to the load. Typically, the TS200 DC Offset or DC output voltage is set to zero and input modulation is set to DC-
Figure 2. Application diagram showing a signal generator is amplified by TS200 for driving heavy load.
The TS200 modulation output can be AC-
In summary, a function generator produces the desired signal waveform and the TS200 amplifies the signal to drive high current load or high capacitive load. The TS200 amplifier is flexible enough to work with a variety of function generators, pulse generators, and arbitrary waveform generators.
Function generator amplifier
Pulse generator amplifier
LDO PSRR measurement
Step Response or line transient response
Drive and testing piezoelectric device
General lab power amplifier
Related App Notes
General lab power
Scientific and industrial testing
Driving magnetic coil
Optical switches and modulators
Automotive transient test