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What is a preamplifier?
The Improvements of signal-to-noise ratio (SNR) is very important in small signals measurements. And preamplifiers are used to amplify signals when they are affected by noise, generally in sensor-based measurements, where the purpose is to improve the SNR. Yet, on the other hand, preamplifiers are sometimes used to change the output impedance of sensors as well.
What is a lock-in amplifier?
The lock-in amplifier measures the amplitude and phase of an AC signal by combining a PSD (phase sensitive detector) and LPF (low-pass filter). Enter an AC "reference signal" and measure only signals of the same frequency. Even if the measurement signal contains AC noise, it is possible to remove the noise and measure the wanted signal only at the specific target frequency.
For specialist of extremely small signal measurement
World's top-level, extremely low-noise amplifier
Amplifies extremely small signals voltage or current
For measuring signals "I wanted to measure" or "I could not measure."
Multi channel low noise amplifier
High precision signal processing for both low impedance sensor and high impedance sensor.
Bipolar input: 1.3nV√Hz
FET input: 2.5nV√Hz
Technical Information
2019.9.23
Lecture for the measurement
Current amplifier (Transimpedance amplifier)
2019.7.1
Lecture for the measurement
Voltage amplifier ("voltage to voltage amplifier")
2020.2.26
Lecture for the measurement
DC-power-supply (AC-DC power supply)
2020.5.20
Lecture for the measurement
Measurement of Small AC Signals and Low Noise Superimposed DC Signal
News
2021.7.29 New Product Wideband Current Amplifier SA-600 series
2021.5.27 New Product Low Noise Preamplifier SA series
2021.1.29 New Product High Speed Bipolar Amplifier HSA series
NF Corporation
Head Office:6-3-20 Tsunashima Higashi, Kohoku-ku, Yokohama 223-8508, Japan
Phone:+81-45-545-8128
FAX:+81-45-545-8187
