difference amplifier การใช้

• The negative feedback into the difference amplifier allows the amplifier to compare the input to the actual output.
• In the top circuit, the voltage doublers, the difference amplifiers and impedances Z ( s ) account for the interaction of the transmission line with the external circuit.
• The impedances Z ( s ), the voltage dependent current sources ( VDCSs ) and the difference amplifiers ( the triangle with the number " 1 " ) account for the interaction of the transmission line with the external circuit.
• Block diagram of PeH
  醶 system with single control loop : F  finger, L  lamp, PC  photo cell, S  segments of transparent pressure cuff, C 1  average of PC-signal, DA  difference amplifier, V ( PG )  plethysmographic signal, PID  correcting network, C 2  set point SP, SW  switch between open and closed loop, PA  power amplifier, EPT  electro-pneumatic transducer, M ( CP ) Pressure measured with Manometer . ( Constructed with respect to PeH
  醶 original drawing ).