Differential Amplifier (DP-301) by Warner Instrument Corp.
Status:
Reviewer
Member since: 2013
Organization: University Of Alaska Fairbanks
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- Ease of use
- After sales service
- Value for money
Application Area: Whole Nerve Recording
"Product has never broken down in the past two years of using it and I’ve never had any problems with it. I would recommend but I am not sure if they're other products for better price."
Review date: 02 Dec 2013 | Differential Amplifier (DP-301)
- High input impedance
- High common mode rejection
- Low noise with high gain
- High tolerance to DC offsets
- Bandwidth filtering available
High Input Z, High CMR
High common mode rejection is very important in minimizing electrical interference. The high input resistance of the DP-301 (1012 ohm typical) ensures that the instrument's high CMR will not be degraded by differences in source impedance at the input. This is important in extracellular recording, where the difference in resistance of the recording and indifferent electrode is often large.
High DC Tolerance
Extracellular action potentials are typically measured in microvolts but are usually accompanied by much larger DC electrode voltages. The DP-301 is designed to amplify these microvolt level events with as much as ± 3 VDC at the input.
High Gain, Low Noise and Bandwidth Limiting
Gain selections of x100, x1000 and x10000. Microvolt signals are sufficiently amplified for computer data acquisition and recorder inputs. Noise is very low, typically 10 µV p-p at 1 Hz to 10 kHz bandwidth. Reducing the bandwidth with the low pass and high pass filters further lowers noise.
Calibration Signal
The internal Cal signal provides a convenient check of amplifier gain and operation.
Battery Powered/Portable
The single channel DP-301 is powered with 4 standard 9 V transistor batteries yielding approximately 500 hours of normal operation. The small size of the DP-301 makes it possible to be placed at the measurement site or inside a Faraday cage. End of battery life is indicated by the Low Bat light.
Input Cables
The standard IC-2S input cables (2 per channel) which are not terminated at the outboard end. Optionally available are cables with 2 mm pin and alligator clip (p/n IC-4M). There is no additional cost if specified at time of order.
IC-4M Cable pictured at right
Product Overview
