Circuit for eliminating leakage current in signal transmission

Electronic digital logic circuitry – Interface – Current driving

Reexamination Certificate

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Details

C326S026000, C326S027000, C326S082000, C326S103000

Reexamination Certificate

active

07038493

ABSTRACT:
A circuit (3) for eliminating leakage current in signals transmitted from a first electronic system (1) to a second electronic system (2) includes two circuit units. Each circuit unit comprises a field-effect transistor (Q1,Q2), a first resistor (R1,R3), a second resistor (R2,R4), and a VCC. A source of the field-effect transistor is connected to the first system, for receiving a signal accompanied by leakage current. A gate of the field-effect transistor is connected to the VCC via the first resistor. A drain of the field-effect transistor is connected to the VCC via the second resistor. The drain of the field-effect transistor is also connected to the second system. The field-effect transistor is configured such that leakage current is blocked thereat, and the signal is transmitted to the second system without the leakage current.

REFERENCES:
patent: 4862018 (1989-08-01), Taylor et al.
patent: 5140194 (1992-08-01), Okitaka
patent: 6323701 (2001-11-01), Gradinariu et al.
patent: 6424174 (2002-07-01), Nowak et al.
patent: 1310502 (2001-08-01), None

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