Krohn-Hite 7602

The Krohn-Hite 7602 is a wideband power amplifier delivering precision performance across DC to 1 MHz with output capabilities reaching ±200V peak and 17W RMS into 1 kΩ loads. Built on hybrid CMOS power operational amplifier technology, it combines low distortion (<0.01% to 5 kHz at 175V peak output) with variable gain control spanning 0 dB to 42 dB across three continuously variable ranges. The amplifier accommodates resistive and reactive loads while functioning as a bipolar high-voltage source through DC coupling and programmable DC offset control (0V to ±200V).

## Technical Specifications

**Output Power & Voltage**
• 17W RMS into 1 kΩ load, DC to 500 kHz; 5W RMS to 1 MHz
• 10W RMS into 600 Ω load, 100 Hz to 1 MHz
• ±200V peak (no load); ±184V peak into 1 kΩ, DC to 500 kHz
• 141V RMS no load; 130V RMS into 1 kΩ, DC to 500 kHz
• ±200 mA peak current, DC to 500 kHz (910 Ω load)

**Frequency Response & Distortion**
• ±0.1 dB flatness, DC to 10 kHz
• ±0.25 dB to 200 kHz; ±0.5 dB to 500 kHz (0–130V RMS)
• Harmonic distortion <0.01% to 5 kHz at 175V peak; 600 V/µs (400Vp-p); rise/fall time 120 ns (50Vp-p)
• Dynamic range >80 dB
• Hum and noise <10 mV RMS (2 MHz bandwidth, standard gain); <20 mV RMS at 28–42 dB gain range
• Load regulation <0.1% (no load to 1 kΩ, DC to 10 kHz); 2% at 1 MHz

**Gain & Stability**
• Continuously variable 0–42 dB across three overlapping ranges (0–14 dB, 14–28 dB, 28–42 dB)
• Gain accuracy ±0.1 dB plus frequency response specification
• Line voltage stability <0.001 dB per 10% change
• DC offset stability <1 mV per 10% line variation; <0.01%/°C temperature coefficient

## Key Features

• DC coupling supports both AC signal amplification and DC level shifting
• Three gain ranges enable precision control across low and high amplitude signals
• <0.5 Ω internal impedance (DC–10 kHz) minimizes load interaction
• Maximum common-mode input ±200V peak (0–14 dB range)
• Inverting (180° ±1°) and non-inverting (0° ±1°) inputs for flexible signal conditioning

## Typical Applications

• High-voltage transducer drive and sensor excitation
• Audio power amplification with precision control
• Reactive load driving (capacitive and inductive)
• Precision test signal generation and function synthesis
• Bipolar DC power supply simulation

## Compatibility & Integration

Accepts three input modes: A, A–B (differential), and –B (inverted). Input impedance specifications not stated. Maximum input voltage ±200V DC to ground without damage.