Electric lamp and discharge devices: systems – Cathode ray tube circuits – Cathode-ray deflections circuits
Patent
1979-10-29
1982-08-24
Hubler, Malcolm F.
Electric lamp and discharge devices: systems
Cathode ray tube circuits
Cathode-ray deflections circuits
324112, 324121R, 340722, G01R 1320, G06F 3147, H01J 2970
Patent
active
043463339
ABSTRACT:
A digital oscilloscope is provided with a position control circuit which permits positioning of a signal both before and after digitizing. A track and hold circuit is coupled to the position control potentiometer to generate a reference voltage which tracks the position voltage in a waveform acquisition mode, and which is held at a fixed level in a display mode while the position voltage, which is applied to the acquisition preamp, is variable adjustable. A summation circuit subtracts the reference voltage from the position voltage to provide an altered positioning voltage for the display amplifier which is zero in the acquisition mode and variable in the display mode.
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patent: 3914758 (1975-10-01), Ingle
patent: 3996582 (1976-12-01), Sinobad
patent: 4107739 (1978-08-01), Rossi et al.
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patent: 4251754 (1981-02-01), Navarro et al.
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patent: 4268855 (1981-05-01), Takahashi
Hubler Malcolm F.
Noe George T.
Tektronix Inc.
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