METHOD OF FABRICATING BIPOLAR TRANSISTORS AND HIGH-SPEED LVDS DRIVER WITH THE BIPOLAR TRANSISTORS
First Claim
1. A method of fabricating a bipolar transistor and a field effect transistor on a substrate, the method comprising the steps of:
- forming a first-conductive first well region of the bipolar transistor deeper than a first-conductive third well region and a second-conductive fourth well region of the field effect transistor; and
forming a second-conductive second well region, which is formed in the first well region, shallower than the third and fourth well regions,wherein the bipolar transistor has a different potential than the field effect transistor.
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Abstract
Provided is a differential signal driver capable of operating at a high speed at a low voltage of 1.8V. The differential signal driver includes: a differential-signal driving circuit for switching input differential signals and outputting a common mode voltage through first and second output nodes; and a common-mode feedback circuit for providing a predetermined current to the differential-signal driving circuit or receiving a predetermined current from the differential-signal driving circuit in response to the common mode voltage. The differential-signal driving circuit includes a common-mode voltage output circuit for connecting the first output node to the second output node and generating the common mode voltage of the differential-signal driving circuit. The differential input signals are received through two bipolar transistors.
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Citations
9 Claims
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1. A method of fabricating a bipolar transistor and a field effect transistor on a substrate, the method comprising the steps of:
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forming a first-conductive first well region of the bipolar transistor deeper than a first-conductive third well region and a second-conductive fourth well region of the field effect transistor; and forming a second-conductive second well region, which is formed in the first well region, shallower than the third and fourth well regions, wherein the bipolar transistor has a different potential than the field effect transistor.
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2. A high-speed low-voltage differential signal driver comprising:
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a differential-signal driving circuit for switching input differential signals and outputting a common mode voltage through first and second output nodes; and a common-mode feedback circuit for providing a predetermined current to the differential-signal driving circuit or receiving a predetermined current from the differential-signal driving circuit in response to the common mode voltage, wherein the differential-signal driving circuit comprises a common-mode voltage output circuit for connecting the first output node to the second output node and generating the common mode voltage of the differential-signal driving circuit, and wherein the differential signals are received through two bipolar transistors. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9)
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Specification