ELECTRONIC DEVICE AND METHOD FOR BUFFERING
First Claim
1. An electronic device comprising a buffer, the buffer having a first switch and a second switch coupled in series at a first output node, a third switch and a fourth switch coupled in series at a second output node, a first current source and a second current source, wherein the first current source is coupled with one side to the first switch and the third switch and with another side to a first supply voltage, the second current source is coupled with one side to the second switch and the fourth switch and with a second side to a second supply voltage, and the first current source is configured to adjust an output swing in a first operation mode and in a second operation mode, and the second current source is configured to adjust a common mode voltage level of the output signal in the first operation mode and to provide maximum series resistance in the second operation mode.
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Accused Products
Abstract
A buffer is provided. The buffer includes a first switch and a second switch coupled in series at a first output node, a third switch and a fourth switch coupled in series at a second output node, a first current source and a second current source. The first current source is coupled with one side to the first switch and the third switch and with another side to a first supply voltage, the second current source is coupled with one side to the second switch and the fourth switch and with a second side to a second supply voltage. The first current source is configured to adjust an output swing in a first operation mode and in a second operation. The second current source is configured to adjust a common mode voltage level of the output signal in the first operation mode and to provide maximum series resistance in the second operation mode.
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Citations
19 Claims
- 1. An electronic device comprising a buffer, the buffer having a first switch and a second switch coupled in series at a first output node, a third switch and a fourth switch coupled in series at a second output node, a first current source and a second current source, wherein the first current source is coupled with one side to the first switch and the third switch and with another side to a first supply voltage, the second current source is coupled with one side to the second switch and the fourth switch and with a second side to a second supply voltage, and the first current source is configured to adjust an output swing in a first operation mode and in a second operation mode, and the second current source is configured to adjust a common mode voltage level of the output signal in the first operation mode and to provide maximum series resistance in the second operation mode.
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13. An apparatus comprising:
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a buffer; a first control circuit that is coupled to the buffer so as to set a tail current for the buffer; and a second control circuit that is coupled to the buffer so as to set a common mode current for the buffer, wherein the first and second control circuits have a first mode, a second mode, a third mode, and a fourth mode, and wherein the tail and common mode currents correspond to the first, second, third, and fourth modes, and wherein, in the first, second, and third modes, the buffer is configured to provide a differential output signal, and wherein, in the fourth mode, the buffer is configured to provide a single-ended output. - View Dependent Claims (14, 15, 16, 17, 18, 19)
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Specification