Low voltage variable gain amplifier with feedback
First Claim
Patent Images
1. A variable gain amplifier comprising:
- an input amplification stage for receiving an input signal and providing an amplified output signal;
a feedback stage for receiving said amplified output signal provided by said input amplification stage, and providing as a function thereof a feedback signal to said input amplification stage; and
a driver stage, coupled to said input amplification stage, configured to receive said amplified output signal provided by said input amplification stage, and provide the output signal of said variable gain amplifier.
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Abstract
An amplifier with negative feedback, disposed in an integrated circuit arrangement, comprises an input amplification stage, configured to receive an input signal. A feedback stage configured to receive the output signal provided by the amplification stage, and provide a corresponding feedback signal to the amplification stage. A driver stage, coupled to the input stage, configured to receive the output signal provided by the amplification stage, and provide the output signal of the amplifier.
16 Citations
38 Claims
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1. A variable gain amplifier comprising:
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an input amplification stage for receiving an input signal and providing an amplified output signal; a feedback stage for receiving said amplified output signal provided by said input amplification stage, and providing as a function thereof a feedback signal to said input amplification stage; and a driver stage, coupled to said input amplification stage, configured to receive said amplified output signal provided by said input amplification stage, and provide the output signal of said variable gain amplifier. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A wireless terminal having an intermediate frequency amplifier comprising:
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an input amplification stage configured to receive an input signal having an intermediate frequency (IF) range and to provide an amplified output signal; a feedback stage configured to receive the amplified output signal provided by said amplification stage, and provide a corresponding feedback signal to said amplification stage, said feedback signal being responsive to a feedback control signal; a driver stage coupled to said input amplification stage configured to receive said amplified output signal provided by said input amplification stage, and provide the output signal of said intermediate frequency amplifier; and a signal processing circuit configured to receive a signal corresponding to said output signal of said intermediate frequency amplifier and provide said feedback control signal to said feedback stage. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24)
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25. An amplifier comprising:
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an input amplification means for receiving and amplifying an input signal, said input amplification means including an output port for providing an amplified output signal; a biasing means coupled to said input amplification means for providing a substantially fixed biasing voltage at said output port of said input amplification means; a feedback means coupled to said biasing means for receiving said amplified output signal provided by said input amplification means via said biasing means, and providing a corresponding feedback signal to said input amplification means; and a driver means coupled to said input amplification means via said biasing means for receiving said amplified output signal provided by said amplification means, and providing the output signal of said amplifier. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32, 33, 34, 35)
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36. A method for providing variable gain amplification comprising the steps of:
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receiving and amplifying an input signal via an input amplification means, and providing an amplified version of said input signal; providing a substantially fixed biasing voltage via a biasing means at an output port of said amplification means; receiving said amplified version of said input signal provided by said input amplification means via said biasing means, and providing a corresponding feedback signal to said input amplification means; and receiving said amplified version of said input signal provided by said amplification means, and providing the output signal of said amplifier via a driving means. - View Dependent Claims (37, 38)
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Specification