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2 Bulletin of the Polish Academy of Sciences. Technical Sciences

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Design of Digital Circuits with Current-mode Gates

Guziński A., Pawłowski P., Czwyrow D., Kaniewski J., Maslennikow O., Maslennikowa N., Rataj D.

Bulletin of the Polish Academy of Sciences. Technical Sciences

2000

Vol. 48, nr 1

73-91

The paper deals with the problem of digital circuit design based on the current-mode gates - novel digital elements operating with a constant, continuous power supply current. The purpose is the provision of a high level noise immunity of chips which contain both analog and digital circuits. The logical properties and several identities of the current-mode logic and some expressions for a conversion of the Boolean functions into the current-mode functions are represented. Based on these properties and expressions, the approaches of minimizing the current logic functions are derived. Moreover, a new concept of the low-voltage current-mode gates realization and the two new types of the current-mode gates are designed for the next reduction of the current mode digital circuit complexity. Based on these approaches and new types of the gates, the functional schemes of some current-mode combinatorial and sequential circuits are derived. The obtained circuits are characterized by lower hardware overheads (up to 35%) in comparison with similar hardware based on the classical voltage type gates.

Current-mode digital circuits for low voltage mixed A/D systems

Guziński A., Pawłowski P., Kaniewski J., Czwyrow D., Maslennikow O.

Bulletin of the Polish Academy of Sciences. Technical Sciences

1998

Vol. 46, nr 4

443-458

Current-mode digital circuits operating with constant, continuous power supply current are presented. Layout of introduced gate and static, classical voltage inverter layout are shown for comparison. SPICE simulations based on extracted parameters of these gates are presented. The elementary operations that form current mode gate basis and elementary logical operations in this basis have been described. The problem of arithmetic-logic unit design based on the current-mode gates is considered.