Transmission system
AssigneeFreescale Semiconductor, Inc.
InventorPERRY H. PELLEY
Life of this patent
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Abstract
A signal transmission system (10) includes a signal generator circuit (12); a signal regenerator circuit (14) coupled to the signal generator circuit by conductive lines (16, 18). The signal regenerator circuit receives input signals from the signal generator circuit on the conductive lines, and the regenerator circuit includes cascoded transistors (39, 41) and level-shifting circuits (26) coupled to the cascoded transistors. The cascoded transistors amplify the input signals to provide amplified signals. The level-shifting circuits shift a voltage level of the amplified signals to provide level-shifted signals.
Claims20
A signal transmission system comprising:
- a signal generator circuit;
- a signal regenerator circuit coupled to the signal generator circuit by conductive lines with parasitic resistance and capacitance, wherein
- the signal regenerator circuit receives input signals from the signal generator circuit on the conductive lines, and
- the signal regenerator circuit includes cascoded transistors, level-shifting circuits coupled to the cascoded transistors, and a plurality of capacitors, wherein;
- the cascoded transistors amplify the input signals to provide amplified signals;
- the level-shifting circuits shift a voltage level of the amplified signals to provide level-shifted signals;
- and
- each of the plurality of capacitors is coupled to a respective one of the conductive lines between the signal generator circuit and the cascoded transistors.
(canceled)
A signal transmission system comprising:
- a signal generator circuit;
- a signal regenerator circuit coupled to the signal generator circuit by conductive lines with parasitic resistance and capacitance, wherein
- the signal regenerator circuit receives input signals from the signal generator circuit on the conductive lines, and
- the signal regenerator circuit includes cascoded transistors, a headroom voltage circuit coupled to the cascoded transistors, and level-shifting circuits coupled to the cascoded transistors, wherein the cascoded transistors amplify the input signals to provide amplified signals and the level-shifting circuits shift a voltage level of the amplified signals to provide level-shifted signals.
A signal transmission system, comprising:
- a pair of amplifying transistors;
- a pair of transmission lines, wherein each of the transmission lines is coupled to provide input signals to a respective one of the amplifying transistors;
- a pair of level-shifting circuits, each of the level-shifting circuits coupled to a respective one of the amplifying transistors, wherein the level-shifting circuits reduce voltage of amplified signals from the amplifying transistors;
- and
- a voltage headroom circuit coupled to the pair of amplifying transistors.
(canceled)
A signal transmission system, comprising:
- a pair of amplifying transistors;
- a pair of transmission lines, wherein each of the transmission lines is coupled to provide input signals to a respective one of the amplifying transistors;
- a pair of level-shifting circuits, each of the level-shifting circuits coupled to a respective one of the amplifying transistors, wherein the level-shifting circuits reduce voltage of amplified signals from the amplifying transistors;
- a pair of capacitors, wherein each of the capacitors is coupled between a respective one of the amplifying transistors and the level-shifting circuits;
- and
- a pair of capacitors, wherein each of the capacitors is coupled between a respective one of the amplifying transistors and the level-shifting circuits.
A method of repeating a transmitted signal comprising:
- receiving a pair of differential signals from a driver circuit;
- generating amplified signals by amplifying the differential signals using respective cascoded amplifying transistors, wherein headroom voltage coupled to a current electrode of each of the amplifying transistors is greater than a supply voltage coupled to gates of the amplifying transistors and the differential signals are capacitively coupled to the cascoded amplifying transistors;
- and
- adjusting voltage levels of the amplified signals to the supply voltage.
(canceled)
Dependencies are inferred from the claim text.