Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – Integrated structure
Patent
1997-04-08
2000-09-26
Ton, My-Trang Nu
Miscellaneous active electrical nonlinear devices, circuits, and
Specific identifiable device, circuit, or system
Integrated structure
326 30, H01L 2500
Patent
active
061247561
ABSTRACT:
An isolation circuit (10) and method for providing dc isolation between two integrated circuit devices (11) and (12) that may be referenced to different ground potentials is presented. The isolation circuit (10) includes, in each circuit, an output buffer (20, 20') connected to deliver a signal to an input/output pin (16, 17) of the circuit (11, 12) with which the output buffer is associated. A capacitance (30), which may be a single capacitor or a combination of capacitors, is connected to the pins (16, 17) of each of the circuits (11, 12), and in each circuit (11, 12), an input buffer (22, 22') is connected to receive a signal delivered onto the I/O pin (16, 17). The input buffer (22, 22') includes a circuit for resisting a charge leakage from the capacitor, which, preferably is a bus holder circuit (36), or the like. In another embodiment, a transformer (85) is used to provide dc isolation between the two integrated circuits (62, 64).
REFERENCES:
patent: 3889072 (1975-06-01), Stewart
patent: 4906871 (1990-03-01), Iida
patent: 5311083 (1994-05-01), Wanlass
patent: 5384808 (1995-01-01), Van Brunt et al.
patent: 5604450 (1997-02-01), Borkar et al.
patent: 5627839 (1997-05-01), Whetsel
Kornher Kevin Lee
Yaklin Daniel A.
Brady III W. James
Courtney Mark E.
Nu Ton My-Trang
Telecky Jr. Frederick J.
Texas Instruments Incorporated
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