Envelope tracking for radio-frequency applications

a radio frequency application and envelope tracking technology, applied in gated amplifiers, process and machine control, instruments, etc., can solve the problems of inability to improve the efficiency of power amplifiers at near-dc low frequencies, and the coupling capacitors are typically blocked in the vicinity of dc low frequencies. achieve the effect of improving the efficiency of power amplifiers
US20180159476A1Inactive Publication Date: 2018-06-07SKYWORKS SOLUTIONS INC
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
SKYWORKS SOLUTIONS INC
Publication Date
2018-06-07
Estimated Expiration
Not applicable · inactive patent

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Abstract

Envelope tracking for radio-frequency applications. In some embodiments, a low frequency loss correction circuit can include a signal error detection circuit configured to produce an error signal in response to detecting one or more frequency components of a tracking signal below a cutoff frequency that are substantially attenuated through a capacitive path. The low frequency loss correction circuit can further include a drive circuit configured to convert the error signal into a low frequency correction signal, and provide the low frequency correction signal to a voltage supply line, the low frequency correction signal including at least some of the one or more frequency components of the tracking signal below a cutoff frequency that are substantially attenuated through the capacitive path.
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Description

CROSS-REFERENCE TO RELATED APPLICATION(S)

[0001] This application is a continuation of U.S. application Ser. No. 14 / 803,355 filed Jul. 20, 2015, entitled ENVELOPE TRACKING WITH LOW FREQUENCY LOSS CORRECTION, which claims priority to and the benefit of the filing date of U.S. Provisional Application No. 62 / 030,224 filed Jul. 29, 2014, entitled ENVELOPE TRACKING WITH LOW FREQUENCY LOSS CORRECTION, the benefits of the filing dates of which are hereby claimed and the disclosures of which are hereby expressly incorporated by reference herein in their entirety.BACKGROUNDField

[0002] The present disclosure generally relates to wireless communication systems and, more specifically, to improving the efficiency of power amplifiers therein.Description of the Related Art

[0003] Power amplifiers are widely used in various communication networks to set the transmission power level of an information-bearing signal transmitted by a device. For example, power amplifiers are used to set the pulse energy em...

Claims

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