Krohn-Hite

Model 7500 Broadband Power Amplifier

The Model 7500 broadband power amplifier is a high-performance, directly coupled all solid state amplifier that can provide the highest continuous power output of 75W (up to 150W under DC conditions) in a wide frequency range of DC 1MHz. Widely used in high-precision testing, sensor driving, power calibration, and scientific research experiments.

The characteristics of Model 7500 include extremely low distortion, wide dynamic range, fast rise time, high stability, as well as adjustable gain and adjustable DC bias control, which can meet the demanding requirements for signal quality in precision electronic testing environments.

Typical application scenarios

High bandwidth signal driving and testing

The Model 7500 has a flat frequency response in the DC~1MHz range (with only ± 1.5dB variation up to 500 kHz), making it suitable for driving electromagnetic transducers, vibration tables, piezoelectric devices, coils, high-power signal sources for experiments, and more. The extremely fast response speed (rise time<500ns) enables it to output high fidelity square waves and modulation signals.

Calibration laboratory and power testing

Model 7500 voltage can stably output up to 125V RMS; The current can stably output up to 625mA RMS, and the harmonic distortion is less than 0.1% within 10kHz when outputting 75W, making it very suitable for:

• Power sensor calibration

• Drive standard loadSystem linearity verification

• High frequency and high-power signal calibrationOr transmit standards

Broadband power amplification in R&D laboratory

In scientific research and engineering development, the Model 7500 is commonly used for:

• Drive broadband simulation system and filtering network

• In precision measurement, asHigh power preamplifier

• For various types of power electronics or high-frequency devicesPerform AC or DC bias driving

The amplifier also provides an adjustable DC bias of ± 200V, which can be used to simulate the bias conditions of various devices in actual operation.

Production Line and Quality Control Application

Due to its stable output, low noise, and high-precision gain control, the Model 7500 can be used for:

• Power module and sensor driver source

• High frequency electronic equipment testing reference source

• Automated Test System (ATE)Broadband signal front-end

Core technical parameters

frequency range

DC~1MHz

output power

75W(DC~100 kHz)

40W(500 kHz)

10W(1 MHz)

output voltage

zui高125V RMS

(200 Ω load)

output current

zui高625 mA RMS

gain mode

20dB(×10)

40dB(×100）

Or 0-40dB continuously adjustable

harmonic distortion

<0.1% (up to 10 kHz)

phase error

Less than ± 1 ° within DC-10kHz

DC bias

Adjustable ± 200V

input impedance

1 M Ω (fixed gain mode)

protection function

Adjustable current limit

Support short circuit protection

Applicable Industries

Electromagnetic and Acoustic Transducers Testing

Precision measurement and national laboratory calibration

Drive and Voltage Test for Aerospace and Defense

Electronic Research and Teaching Laboratory

Industrial Automation and Production Quality Control

The Model 7500, as a high-performance broadband power amplifier from Krohn Hite, has become an important device in Gao end electronic testing and broadband drive applications due to its wide bandwidth, low distortion, high power output, and precise adjustable gain/bias capability.