Browse Prior Art Database

Electronic Integration System For Low Level Fast Signals

IP.com Disclosure Number: IPCOM000097127D
Original Publication Date: 1962-May-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 43K

Publishing Venue

IBM

Related People

Picciano, JK: AUTHOR [+3]

Abstract

The integrator is responsive to signals having a magnitude of the order of five millivolts and a pulse width of the order of one nanosecond. A sampling oscilloscope 20, e.g., a Hewlett Packard Model 185, is connected to receive a trigger signal from an external source, an input signal on Channel A and a control signal on Channel B. The trigger and channel signals are controlled by circuitry, not shown, so that they occur in a selected time relation. The output of oscilloscope 20 is supplied to integrator 22 including a capacitor 24 for storage of the D.C. level of 20 and capacitors 26 and 27 for integrating the combined D.C. and output signal level of 20. Relay contacts 28, 30 and 32 connect and disconnect the capacitors to the output of 20.

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Electronic Integration System For Low Level Fast Signals

The integrator is responsive to signals having a magnitude of the order of five millivolts and a pulse width of the order of one nanosecond. A sampling oscilloscope 20, e.g., a Hewlett Packard Model 185, is connected to receive a trigger signal from an external source, an input signal on Channel A and a control signal on Channel B. The trigger and channel signals are controlled by circuitry, not shown, so that they occur in a selected time relation. The output of oscilloscope 20 is supplied to integrator 22 including a capacitor 24 for storage of the D.C. level of 20 and capacitors 26 and 27 for integrating the combined D.C. and output signal level of 20. Relay contacts 28, 30 and 32 connect and disconnect the capacitors to the output of 20. Differential amplifier 34 is connected in the integrator to determine the difference between the D.C. level and the combined signal of 20. The amplifier 34 output is supplied through relay contacts 28' to a second circuit. This includes capacitor 36 which stores the value of the integral and amplifier 38. The latter provides a high input impedance to integrator 22 and provides a low output impedance to a utilization circuit, not shown.

The Channel A input signal is 50. The sampling interval of oscilloscope 20 is indicated by vertical lines 52. The Channel B control shows waveforms 60 and 62 for selecting the desired pulse to be integrated. The D. C. sampling interval is indicated below signal 50. Sweep signal 64 of 20 completes the inputs to the oscilloscope.

Normally, contacts 32 are open. They close to permit capacitor 24 to charge to the D. C. level of 20. The integration cycle begins with contacts 32 opening and the contacts 28...