Patent ID: 6320417
Filing Date: 2001-11-20
Classification: H04L

Abstract:
A current mode transmitter to simultaneously transmit a first and a second digital data bit combined to form a current mode signal, whereby the current mode signal comprises a first positive current, a second positive current, a first negative current and a second negative current, comprising:a) a first and a second transmitter input terminal to receive the first and second digital data bits;b) a transmitter output terminal to transmit the current mode signal;c) a first MOS transistor of a first conductivity type having a gate coupled to the first transmitter input terminal, a drain coupled to the high supply voltage source, and a source coupled to the transmitter output terminal;d) a first MOS transistor of a second conductivity type having a gate coupled to the first transmitter input terminal, a drain coupled to the low supply voltage source, and a source coupled to the transmitter output terminal;e) a second MOS transistor of the first conductivity type having a gate coupled to the second transmitter input terminal, a drain coupled to the high supply voltage source, and a source;f) a third MOS transistor of the first conductivity type having a gate coupled to the first transmitter input terminal, a drain coupled to the source of the second MOS transistor of the first conductivity type, and a source coupled to the transmitter output terminal;g) a second MOS transistor of the second conductivity type having a gate coupled to the second transmitter input terminal, a drain coupled to the low supply voltage source, and a source; andh) a third MOS transistor of the second conductivity type having a gate coupled to the first transmitter input terminal, a drain coupled to the source of the second MOS transistor of the second conductivity type, and a source coupled to the transmitter output terminal.