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            當(dāng)前位置：> 供求商機(jī)> Differential Pre-Amplifier, 4 channel   微型前置放大器
            
		
            
	
            

            

            
	
            
		
            
			
            [供應(yīng)]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(guó)
            
                            							
            更新時(shí)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(diǎn)擊：60
            
				
            
				
				
				
            
					
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						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.
					
            
					
					
            
						
            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)
            Per channel at f=50-60Hz
            100dB
            Input referred noise voltage per channel
            16 nV/http://www.thomasrecording.com/fileadmin/user_upload/picture/symbol-sqrt.jpgHz
            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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