Transmission line drivers and serial interface data transmission devices including the same
First Claim
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1. A transmission line driver, comprising:
- a pre-driver configured to generate and output differential input data signals based on a serial transmission data signal;
a differential amplifier configured to receive the differential input data signals through a first input terminal and a second input terminal and to output differential output data signals through a first output terminal and a second output terminal; and
a common mode controller configured to drive the differential output data signals to a predetermined common mode voltage in an idle mode and configured to be turned off in a normal mode;
wherein the common mode controller comprises;
a plurality of switch pairs connected to the first power supply terminal and the first and second output terminals, the plurality of switch pairs being responsive to logic operation result signals that arc generated based on an idle mode signal and a plurality of predetermined control signals.
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Abstract
A transmission line driver and a serial interface data transmission device including the same are provided. The transmission line driver includes a pre-driver configured to generate and output differential input data signals based on a serial transmission data signal, a differential amplifier configured to receive the differential input data signals and to output differential output data signals, and a common mode controller configured to drive the differential output data signals to a predetermined common mode voltage in an idle mode. Accordingly, power consumption can be reduced and a common mode specification can be supported.
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Citations
16 Claims
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1. A transmission line driver, comprising:
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a pre-driver configured to generate and output differential input data signals based on a serial transmission data signal; a differential amplifier configured to receive the differential input data signals through a first input terminal and a second input terminal and to output differential output data signals through a first output terminal and a second output terminal; and a common mode controller configured to drive the differential output data signals to a predetermined common mode voltage in an idle mode and configured to be turned off in a normal mode; wherein the common mode controller comprises; a plurality of switch pairs connected to the first power supply terminal and the first and second output terminals, the plurality of switch pairs being responsive to logic operation result signals that arc generated based on an idle mode signal and a plurality of predetermined control signals. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A serial interface data transmission device, comprising:
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a serial converter configured to convert and output parallel data to be transmitted as serial transmission data signals; and a transmission line driver configured to generate and output differential output data signals having a predetermined common mode voltage responsive to the serial transmission data signals and an idle mode signal, wherein the transmission line driver comprises; a pre-driver configured to generate and output differential input data signals based on the serial transmission data signal; a differential amplifier configured to receive the differential input data signals through a first input terminal and a second input terminal and to output differential output data signals through a first output terminal and a second output terminal; and a common mode controller configured to drive the differential output data signals to a predetermined common mode voltage in an idle mode and configured to be turned off in a normal mode; wherein the common mode controller comprises; a plurality of switch pairs connected to the first power supply terminal and the first and second output terminals, the plurality of switch pairs being responsive to logic operation result signals that are generated based on an idle mode signal and a plurality of predetermined control signals. - View Dependent Claims (15, 16)
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Specification