Pulse or digital communications – Systems using alternating or pulsating current
Patent
1994-07-29
1996-04-02
Chin, Stephen
Pulse or digital communications
Systems using alternating or pulsating current
327103, 330257, H04L 2700
Patent
active
055047823
ABSTRACT:
A current mode transmitter (21) receives an input signal and converts the input signal to a current having at least two values. The current is transmitted across a transmission line (27) to a current mode receiver (30). The current mode receiver (30) has a low impedance input node (102) coupled to the transmission line (27) for receiving the current. Complementary voltage-follower transistors (35, 36) in the receiver (30) are connected to the transmission line (27). A current mirror (31, 42) is coupled to each of the voltage-follower transistors (35, 36) to convert the current to a CMOS signal. The reduced signal swing of the transmitted signal reduces RFI emissions as compared to a signal having a larger signal swing.
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Toumazou et al., "Analogue IC design: the current-mode approach", 1990, pp. 93-111.
Quigley et al., "Current Mode Transceiver Logic, (CMTL) For Reduced Swing CMOS Chip to Chip Communication", Proceedings of 6th Annual IEEE Int. ASIC Conf., Oct. 93, pp. 452-455.
Bocure Tesfaldet
Chin Stephen
Hill Daniel D.
Motorola Inc.
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