Television – Monitoring – testing – or measuring
Patent
1997-04-17
2000-10-17
Peng, John K.
Television
Monitoring, testing, or measuring
348181, 324 7652, 324 7666, H04N 1700, H04N 1702
Patent
active
061339490
ABSTRACT:
For measuring the frequency bandwidth of a signal-processing circuit with minimal external influences, a measuring circuit for a signal-processing circuit (1), arranged on an integrated circuit, for processing at least a picture signal is characterized in that measuring pulses are applied to the signal-processing circuit (1), in that the measuring circuit changes the charge of a capacitance (10) arranged in the measuring circuit, dependent on the time shift experienced by the measuring pulses in the signal-processing circuit (1), in that the measuring circuit switches the measuring capacitance (10) before each measuring process to a reference potential for a short time by means of an electronic switch (8), and in that the measuring circuit is arranged on the same integrated circuit as the signal-processing circuit (1) and is activated only during a measuring process.
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Foreign search report from EPO for application EP 97201093, Feb. 1999.
Goodman Edward W.
Lo Linus H.
Peng John K.
U.S. Philips Corporation
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