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貨物所在地:上海上海市
產(chǎn)地:德國
更新時間:2024-11-06 13:49:15
有效期:2024年11月6日 -- 2025年11月6日
已獲點擊:63
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當前位置:> 供求商機> Differential Pre-Amplifier, 4 channel 微型前置放大器
當前位置:> 供求商機> Differential Pre-Amplifier, 4 channel 微型前置放大器
貨物所在地:上海上海市
產(chǎn)地:德國
更新時間:2024-11-06 13:49:15
有效期:2024年11月6日 -- 2025年11月6日
已獲點擊:63
聯(lián)系我時,請告知來自 化工儀器網(wǎng)
DPA-4
Description
The Differential Pre-Amplifier, Model DPA-4 is a miniature 4-channel, high impedance, differential input preamplifier that is designed for low noise recordings from excitable tissue. It is intended for extracellular recording in conjunction with Thomas Tetrodes and Thomas single microelectrodes. It can be used in a number of research or teaching applications requiring extracellular neurophysiological recording from excitable tissue.
Figure 1: Differential input preamplifier DPA-4
The DPA-4 is connected to metal microelectrodes or tetrodes for providing an initial tenfold amplification stage. Ideally Thomas RECORDING quartz glass insulated platinum/tungsten microelectrodes or tetrodes are used to yield optimal recording results with high signal amplitudes and low noise levels.
Figure 2: DPA-4 size comparison to a standard AA-size battery
Figure 3: Connection of a Thomas Tetrode to the DPA-4 input socket
The DPA-4 has a small size and weight and therefore it is easy to integrate this amplifier in many recording setups. Special adapted holders for manual microdrives are available from Thomas RECORDING (see figure 4). Custom-made adaptations are possible
Figure 4: DPA-4 mounted to a manual xyz-manipulator together with a Thomas Tetrode
The DPA-4 is delivered as a DC-coupled preamplifier to yield optimal common mode rejection ratio (CMRR). An AC-coupled version is available on request. The DPA-4 is equipped with an additional common ground and reference electrode input.
The aluminum case of the DPA-4 provides electrical shielding. Electrode damage is prevented by the very low bias current. The high input impedance ensures stable long-term recordings.
Beside the possibility to use Thomas microelectrodes and tetrodes, adapters for other microelectrodes for acute and chronic recordings are available.
To avoid additional noise pickup from the power supply there is a special designed accumulator power supply and a battery charger available for power supply of the DPA-4 (see figure 5 and 6).
Figure 5: Accumulator power supply for the DPA-4
Figure 6: Accumulator charger
Parameter | Value |
Dimensions and Weight |
|
Length (mm) | 40 |
Width (mm) | 34 |
Height (mm) | 7,5 |
Weight (gramms) | 26 |
Power Supply |
|
Supply voltage (V) | ±6V DC |
Supply current (mA) | ±5,3mA |
Amplifier Data |
|
Gain per channel | 9,9 |
Number of channels | 4 |
Bandwidth per channel | 0...40kHz |
Input circuit per channel | DC-coupled (AC on request) |
Common mode rejection ratio/channel (CMRR) | 100dB |
Input referred noise voltage per channel | 16 nV/ |
Crosstalk attenuation between channels | 55 - 73dB |
Environmental condition |
|
Operating temperature range | +10°C to +40°C |
Transport temperature range | +10°C to +40°C |
Humidity | 20% - 80% RH (non-condensing) |
Table 1: Technical Data of the Thomas RECORDING DPA-4
For custom-made electrode adapters, please contact Thomas RECORDING for more information.
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