FIRST IN PHOTONICS
Signal Recovery designs, manufactures and sells lock-in amplifiers, signal averagers, amplifiers, light choppers, signal multiplexers, and specialized counters.
The model 5113 is a high performance, low noise voltage preamplifier with continuously adjustable gain and selectable high, low or band pass filtering.
The model 5182 is a current-to-voltage preamplifier of low noise and low input impedance designed to amplify the extremely low currents encountered in such areas as photometry and semiconductor research.
The model 5184 is a medium input impedance, AC-coupled, voltage preamplifier which features an ultra-low noise input stage. It has a frequency response from 0.5 Hz to 1 MHz and a fixed gain of x1000 (60 dB) and incorporates a special pseudo-differential input stage that can be floated to give the ground loop immunity normally associated with true differential inputs but without the associated noise penalty.
The model 5185 is a wideband voltage preamplifier with a frequency response from DC to 200 MHz and switchable gain settings of x10 (20 dB) or x100 (40 dB). It has a selectable input impedance of 50Ω or 1 MΩ and a DC offset facility.
The model 5186 is a high input impedance, low-noise, AC-coupled voltage preamplifier which offers a true differential input. It has a frequency response from 0.5 Hz to 1 MHz and three switched gain settings of x10, x100 and x1000. It is a general purpose preamplifier which has the facility to be connected to grounded sources in a manner which breaks ground loops and since it has a true differential input it can be used to measure floating sources, such as the output from an AC bridge, without imposing an asymmetrical load onto the source.
The model 181 is a current-to-voltage preamplifier of low noise and low input impedance designed to amplify the extremely low currents encountered in such areas as photometry and semiconductor research. In photometric applications the low input noise allows the use of photodetectors with dark currents as low as 10-14 A/√Hz, while the wide frequency range permits high modulation frequencies to avoid 1/f noise and power-line pick-up.
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