Adaptive radio transceiver with a power amplifier
First Claim
1. An amplifier, comprising:
- a plurality of differential pairs coupled together through a common differential output, each differential pair having a current control input; and
a current switch coupled to the current control input of one of the differential pairs to selectively switch said one of the differential pairs in or out of the amplifier,wherein the current switch comprises a current source having a switch control input,wherein a bias circuit is coupled to the switch control input,wherein the bias circuit generates a bias current that is applied to the switch control input, andwherein the bias circuit comprises a first bias circuit having a first bias current exhibiting a positive temperature coefficient, a second bias circuit having a second bias current exhibiting a negative temperature coefficient, and a summer to sum the first and second bias currents, the summed first and second bias currents being applied to the switch control input.
6 Assignments
0 Petitions
Accused Products
Abstract
An exemplary embodiment of the present invention described and shown in the specification and drawings is a transceiver with a receiver, a transmitter, a local oscillator (LO) generator, a controller, and a self-testing unit. All of these components can be packaged for integration into a single IC including components such as filters and inductors. The controller for adaptive programming and calibration of the receiver, transmitter and LO generator. The self-testing unit generates is used to determine the gain, frequency characteristics, selectivity, noise floor, and distortion behavior of the receiver, transmitter and LO generator. It is emphasized that this abstract is provided to comply with the rules requiring an abstract which will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or the meaning of the claims.
78 Citations
119 Claims
-
1. An amplifier, comprising:
-
a plurality of differential pairs coupled together through a common differential output, each differential pair having a current control input; and a current switch coupled to the current control input of one of the differential pairs to selectively switch said one of the differential pairs in or out of the amplifier, wherein the current switch comprises a current source having a switch control input, wherein a bias circuit is coupled to the switch control input, wherein the bias circuit generates a bias current that is applied to the switch control input, and wherein the bias circuit comprises a first bias circuit having a first bias current exhibiting a positive temperature coefficient, a second bias circuit having a second bias current exhibiting a negative temperature coefficient, and a summer to sum the first and second bias currents, the summed first and second bias currents being applied to the switch control input. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
-
-
26. An amplifier, comprising:
-
a plurality of amplifying stages each having first and second transistors, the first and second transistors each having first, second and third nodes, the first nodes of the first transistors being coupled together and the first nodes of the second transistors being coupled together to form a differential output, the second nodes of the first transistors being coupled together and the second nodes of the second transistors being coupled together to form a differential input, and the third node of each of the first transistors being coupled to the third node of its respective second transistor to form a current control input for each of the amplifying stages; and a current switch coupled to the current control input of one the amplifying stage to switch said one of the amplifying stages in or out of the amplifier. - View Dependent Claims (27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52)
-
-
53. An amplifier, comprising:
-
a plurality of amplifying stages coupled together, each of the amplifying stages having a current control input; and a current switch coupled to the current control input of one of the amplifying stages to selectively switch said one of the amplifying stages in or out of the circuit, wherein the current switch comprises a current source having a switch control input, wherein a bias circuit is coupled to the switch control inputs, wherein the bias circuit generates a bias current that is applied to the switch control input, and wherein the bias circuit comprises a first bias circuit having a first bias current exhibiting a positive temperature coefficient, a second bias circuit having a second bias current exhibiting a negative temperature coefficient, and a summer to son the first and second bias currents, the summed first and second bias currents being applied to the switch control input. - View Dependent Claims (54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77)
-
-
78. An amplifier comprising:
-
a digitally programmable power level and a matching circuit which is substantially independent of the programmed power level; and a plurality of amplifying stages coupled together, each of the amplifying stages having a current control input, and a plurality of current switches to digitally program the power level of the amplifier, the current switches each being coupled to the current control input for a different one of the amplifying states to selectively switch its respective amplifying stage in or out of the amplifier, wherein the current switches each comprises a current source having, a switch control input, wherein a plurality of bias circuits each is coupled to a different one of the switch control inputs, wherein the bias circuits each generates a bias current that is applied to its respective switch control input, and wherein the bias circuits each comprises a first bias circuit having a first bias current exhibiting a positive temperature coefficient, a second bias circuit having a second bias current exhibiting a negative temperature coefficient, and a summer to sum the first and second bias currents, the summed first and second bias currents being applied to the its respective switch control input. - View Dependent Claims (79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97)
-
-
98. An amplifier, comprising:
-
a plurality of amplifying stages coupled together; switching means for switching one of the amplifying stages in or out of the amplifier to program power of the amplifier; and matching means for matching a load coupled to an output of the amplifier, the matching means being substantially independent of the programmed power, wherein the amplifying stages comprises a differential output having first and second outputs, and the matching circuit comprises an inductor having a first end coupled to the first output and a capacitor having a first end coupled to the second output, the inductor and capacitor each having second end coupled to the amplifier output. - View Dependent Claims (99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119)
-
Specification