A high-impedance differential amplifier is useful in remote locations by zib42419

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									                                       R4
                                      10M


Figure 1                                                C
                                                  S1               C1        C3
                     R3                                           10 F     0.1 F AMPLIFIER GAIN 100
                    100k                   A
                             2                              B     D2
            V2                   IC1 7                          1N914B
                                            6
                                MAX-                                                    S
                             3 7614               R5                                    E
            V1                 +     4
                                                  10k             D1
                     R1
       GROUND                                                   1N914B
                    100k       R2
                                                                                                COAXIAL
                              10M                                  C2        C4               CABLE OF LOW
                                                                 10 F      0.1 F                LEAKAGE
                                                                  10V       DISC                CURRENT




                                                                  1                 8           4.5 TO 8V
                                                                                             SQUARE PULSES

                 OUTPUT                                           2                 7           8V
                           LOW-LEAKAGE           C5
                           SAMPLE-AND-         0.1 F               3                6          CONTROL (TTL)
                          HOLD CAPACITOR                                                              SENSE
                                                                                               CHARGE
                                                   8V             4                 5 5V
                                                                           IC2
                                                                         MAX319




   A high-impedance differential amplifier is useful in remote locations, because it requires no local
   power supply.

								
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