. The Bell System technical journal . of the linear term (evaluated when / = 4 X 10^ seconds) if/i ^ 30 cycles per second, J2 ^ 800 cycles per second, and if the first1000 microseconds of the voltage ramp are not used. Consequently, 80db of negative feedback must be maintained over a band extending from30 to 800 cycles per second in order to realize the desired output voltagelinearity. Detailed Circuit Arrangement Fig. 13 shows the circuit diagram of the integrator. The method ofbiasing is the same as is used in the summing amplifier. The 200,000-ohmresistor provides approximately mil
. The Bell System technical journal . of the linear term (evaluated when / = 4 X 10^ seconds) if/i ^ 30 cycles per second, J2 ^ 800 cycles per second, and if the first1000 microseconds of the voltage ramp are not used. Consequently, 80db of negative feedback must be maintained over a band extending from30 to 800 cycles per second in order to realize the desired output voltagelinearity. Detailed Circuit Arrangement Fig. 13 shows the circuit diagram of the integrator. The method ofbiasing is the same as is used in the summing amplifier. The 200,000-ohmresistor provides approximately milliamperes of collector current forthe first stage. The 40,000-ohm resistor provides approximately of collector current for the second stage. The output stageis designed for a maximum power dissipation of 120 milliwatts and foran output voltage swing between —5 and +24 volts when operatinginto a load resistance equal to or greater than 40,000 ohms. J+08V • + 108V 42 K D2 44- C ;(/F 270 K I + I08V. 1MEG 200n \—vw 2> 200 K rVWA/^An j 100 K [ POT. I
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Keywords: ., bookcentury1900, bookdecade1920, booksubjecttechnology, bookyear1
