Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Having specific delay in producing output waveform
Patent
1996-11-01
1998-08-11
Callahan, Timothy P.
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Having specific delay in producing output waveform
327284, 327288, H03K 513
Patent
active
057932387
ABSTRACT:
The present invention concerns a delay circuit that provides a fixed amount of delay that is generally independent of process variations. An input resistance is provided that may be presented to a threshold device, such as an inverter, that may then be presented as an output. The output of the threshold device may also be presented through a feedback path comprising a capacitive device to the input of the threshold device. The feedback through the capacitive load actively resists the movement of the load. As a result, the delay provided by the circuit is generally resistant to process variations.
REFERENCES:
patent: 4359649 (1982-11-01), Mundel
patent: 4644182 (1987-02-01), Kawashima et al.
patent: 4812687 (1989-03-01), Larson et al.
patent: 5191245 (1993-03-01), Kang
patent: 5548237 (1996-08-01), Iadanza et al.
patent: 5572159 (1996-11-01), McFarland
Hiroshi Sakamoto, "Timing Generator", Motorola Technical Developments, vol. 6, p. 26-27, Oct. 1986.
Callahan Timothy P.
Cypress Semiconductor Corp.
Shin Eunja
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