Method and apparatus for driving an integrated-circuit output pad
Patent 5039874 Issued on August 13, 1991. Estimated Expiration Date: 
March 15, 2010. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
March 15, 2010. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesOutput circuit having transistor monitor for matching output impedance to load impedance CMOS output buffer having improved noise characteristics Full-level, fast CMOS output buffer Driver circuit providing load and time adaptive current Output buffer having programmable drive current Output buffer for reducing switching induced noise Patent #: 4961010 InventorApplicationNo. 494196 filed on 03/15/1990US Classes:327/109, Having semiconductive load326/112, Field-effect transistor (e.g., JFET, etc.)326/121, CMOS326/124, Bipolar transistor (e.g., RTL, DCTL, etc.)327/170Slope control of leading or trailing edge of rectangular (e.g., clock, etc.) or pulse waveformExaminersPrimary: Miller, Stanley D.Assistant: Wambach, Margaret Rose International ClassesH03K 003/01H03K 005/12 H03K 019/094 AbstractA binarily programmable IC output pad driver includes a pair of FET drivers, one of which is always drivingly connected to the chip output pad. A second driver is selectively connected to the pad for driving the same in concert with the first driver in order to increase signal transition speed on the output pad. With both drivers driving, noise on the output pad increases and, if the particular application is effected by the increased noise level, signals applied to input pads on the chip disconnect the second driver to reduce pad noise. | |
