SYSTEM AND METHOD FOR BIASING ELECTRICAL CIRCUITS
First Claim
1. A method of supplying bias comprising:
- generating, by a reference bias source, a reference bias signal having a desired bias value;
calibrating an adjustable master bias source by sending the adjustable master bias source a control code which causes the adjustable master bias source to generate a master bias signal having the desired bias value; and
calibrating first and second adjustable slave bias sources by sending the control code to the first and second adjustable slave bias sources to cause the first and second adjustable slave bias sources to generate respective first and second slave bias signals having the desired bias value.
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Abstract
A bias system is disclosed including a calibration bus to which a controller, a reference bias source, a master bias source, and first and second slave bias sources are coupled. The controller varies a control code sent over the calibration bus to the master bias source until a particular control code is found that causes the bias signal of the master bias source to equal a desired bias value which is provided by the reference bias source. The controller then sends the particular control code to the first and second slave bias sources to cause the first and second slave bias sources to generate a bias signal having the same desired bias value as the master bias source. Isolation between load circuits coupled to the first and second bias sources is thus enhanced while providing low noise, stable operation
9 Citations
96 Claims
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1. A method of supplying bias comprising:
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generating, by a reference bias source, a reference bias signal having a desired bias value;
calibrating an adjustable master bias source by sending the adjustable master bias source a control code which causes the adjustable master bias source to generate a master bias signal having the desired bias value; and
calibrating first and second adjustable slave bias sources by sending the control code to the first and second adjustable slave bias sources to cause the first and second adjustable slave bias sources to generate respective first and second slave bias signals having the desired bias value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method of supplying bias comprising:
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generating, by a first reference bias source, a first bias signal having a desired first bias value;
generating, by a second reference bias source, a second bias signal having a desired second bias value;
calibrating a first adjustable master bias source by sending the first adjustable master bias source a first control code which causes the first adjustable master bias source to generate a first master bias signal having the desired first bias value;
calibrating a second adjustable master bias source by sending the second adjustable master bias source a second control code which causes the second adjustable master bias source to generate a second master bias signal having the desired second bias value; and
calibrating first and second adjustable slave bias sources by sending the first and second control codes to the first and second adjustable slave bias sources, respectively, to cause the first and second adjustable slave bias sources to having the desired first and second bias values, respectively. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
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34. A method of supplying bias comprising:
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generating, by a reference bias source, a reference bias signal having a desired bias value;
calibrating an adjustable master bias source by sending the adjustable master bias source a control code which causes the adjustable master bias source to generate a master bias signal having the desired bias value; and
calibrating an adjustable slave bias source by sending the control code to the adjustable slave bias source to cause adjustable slave bias source to generate a slave bias signal having the desired bias value. - View Dependent Claims (35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47)
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48. A bias system comprising:
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a calibration bus;
a reference bias source, coupled to the calibration bus, that generates a bias signal having a desired bias value;
an adjustable master bias source, coupled to the calibration bus, that receives a control code which causes the adjustable master bias source to generate a master bias signal having the desired bias value; and
first and second adjustable slave bias sources, coupled to the calibration bus, that receive the control code to cause the first and second adjustable slave bias sources to generate respective first and second slave bias signals having the desired bias value. - View Dependent Claims (49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60)
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61. A bias system comprising:
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a calibration bus;
first and second reference bias sources, coupled to the calibration bus, that generate first and second bias signals, respectively, the first and second bias signals having first and second desired bias values, respectively;
first and second adjustable master bias sources, coupled to the calibration bus, that receive first and second control codes, respectively, which cause the first and second adjustable master bias sources to respectively generate a first master bias signal having the first desired bias value and a second master bias signal having the second desired bias value; and
first and second adjustable slave bias sources, coupled to the calibration bus, that receive the first and second control codes, respectively, to cause the first and second adjustable slave bias sources to respectively generate a first slave bias signal having the first desired bias value and a second slave bias signal having the second desired slave bias value. - View Dependent Claims (62, 63, 64, 65, 66, 67, 68, 69, 70)
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71. A bias system comprising:
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a calibration bus;
a reference bias source, coupled to the calibration bus, that generates a bias signal having a desired bias value;
an adjustable master bias source, coupled to the calibration bus, that receives a control code which causes the adjustable master bias source to generate a master bias signal having the desired bias value; and
an adjustable slave bias source, coupled to the calibration bus, that receives the control code to cause the adjustable slave bias source to generate a slave bias signal having the desired bias value. - View Dependent Claims (72, 73, 74, 75, 76, 77, 78)
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79. An integrated circuit device comprising:
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a calibration bus;
a reference bias source, coupled to the calibration bus, that generates a bias signal having a desired bias value;
an adjustable master bias source, coupled to the calibration bus, that receives a control code which causes the adjustable master bias source to generate a master bias signal having the desired bias value;
first and second adjustable slave bias sources, coupled to the calibration bus, that receive the control code to cause the first and second adjustable slave bias sources to generate respective first and second slave bias signals having the desired bias value; and
first and second loads coupled to the first and second adjustable slave bias sources, respectively. - View Dependent Claims (80, 81, 82, 83, 84, 85, 86, 87, 88, 89)
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90. An integrated circuit device comprising:
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a calibration bus;
first and second reference bias sources, coupled to the calibration bus, that generate first and second bias signals, respectively, the first and second bias signals having first and second desired bias values, respectively;
first and second adjustable master bias sources, coupled to the calibration bus, that receive first and second control codes, respectively, which cause the first and second adjustable master bias sources to respectively generate a first master bias signal having the first desired bias value and a second master bias signal having the second desired bias value;
first and second adjustable slave bias sources, coupled to the calibration bus, that receive the first and second control codes, respectively, to cause the first and second adjustable slave bias sources to respectively generate a first slave bias signal having the first desired bias value and a second slave bias signal having the second desired slave bias value; and
first and second loads coupled to the first and second adjustable slave bias sources, respectively. - View Dependent Claims (91, 92, 93, 94, 95, 96)
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Specification