Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Amplitude control
Patent
1998-04-01
1999-12-21
Callahan, Timothy P.
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Amplitude control
327108, 327199, 326 62, 326 83, G06F 500
Patent
active
060054328
ABSTRACT:
A voltage level shift system transitions a voltage signal between two components and includes a first inverter, a signal pass subsystem, a pull-up transistor, a second inverter, and a third inverter. The first inverter is coupled to the signal pass subsystem. The signal pass subsystem is coupled to the pull-up transistor, the second inverter, and the third inverter. The signal pass subsystem includes a first passgate and a second passgate. When an input voltage transitions from a logic low to a logic high, the first inverter inverts the logic high input signal to a logic low and passes this signal through the passgate subsystem. The second inverter receives the logic low signal and immediately inverts it to transition the output signal from a low logic to a logic high. The logic high output signal, turns off the pull-up transistor. When the input signal transitions from a logic high to a logic low, the first inverter receives the signal and generates a logic low signal that passes through the passgate subsystem. The second inverter receives the logic low signal and immediately inverts it to transition the output signal from a logic high to a logic low. The logic low signal places the pull-up transistor in an on state to turn off the p-device in the circuit. A method for transitioning a voltage signal between two components is also disclosed.
REFERENCES:
patent: 3921010 (1975-11-01), Griffin
patent: 4743862 (1988-05-01), Scheinberg
patent: 5111064 (1992-05-01), Ward
patent: 5764077 (1998-06-01), Andresen et al.
patent: 5926056 (1999-07-01), Morris
Guo Xiaoyi
Ranjan Nalini
Callahan Timothy P.
Luu An T.
S3 Incorporated
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