Electronic digital logic circuitry – Multifunctional or programmable – Having details of setting or programming of interconnections...
Reexamination Certificate
2005-09-27
2005-09-27
Chang, Daniel (Department: 2819)
Electronic digital logic circuitry
Multifunctional or programmable
Having details of setting or programming of interconnections...
C327S390000, C327S525000, C365S096000, C326S088000
Reexamination Certificate
active
06949952
ABSTRACT:
An isolation circuit for coupling a large programming voltage from an external terminal to a circuit ground node includes an NMOS isolation transistor through which the programming voltage is coupled, and a charge pump that applies a voltage having at least the magnitude of the programming voltage to the gate of the NMOS transistor. As a result, the NMOS transistor is able to pass the full magnitude of the programming voltage to the circuit ground node. The charge pump can generate a voltage having a sufficient magnitude with only a single charge pump stage because the charge pump uses the relatively large programming voltage as the starting point for the voltage boosting process.
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Ingalls Charles L.
Mecier Richard A.
Chang Daniel
Dorsey & Whitney LLP
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