Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Having specific delay in producing output waveform
Patent
1994-03-14
1996-07-09
Callahan, Timothy P.
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Having specific delay in producing output waveform
327400, 377124, 377126, 331 45, 331 57, H03B 2700
Patent
active
055348092
ABSTRACT:
A pulse phase difference encoding circuit includes a ring delay pulse generating circuit which is formed by a NAND circuit and inverters. Signal lines connecting the NAND circuit and the inverters have uniform load capacity to obtain even time resolutions. The NAND circuit is formed by component transistors one of which is larger in size to have the same delay time as the other inverters. A dedicated latch buffer for applying steeply changing drive pulse to a pulse selector is provided to prevent difference in the measurements. A specific value is outputted in the event of the overflow or underflow of the measurement time to obtain a constant digital output.
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patent: 5302920 (1994-04-01), Bitting
T. Rahkonen et al., "Time Interval Measurement Using Integrated Tapped CMOS Delay Lines", Dept. of Electrical Engineering, University of Oulu, Finland, p. 201-205, 1990.
Aoyama Seiki
Watanabe Takamoto
Callahan Timothy P.
Englund Terry L.
Nippondenso Co. Ltd.
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