Patent
Envelope tracking power supply with direct connection to power source
Debopriyo Chowdhury,Ali Afsahi +1 more
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TLDR
In this paper, an envelope tracking power supply is configured for direct connection to a supply voltage, which is made without connection through an intermediate voltage regulator, such as a low drop out regulator.Abstract:
A communication device, such as a smart phone, includes an envelope tracking power supply. The envelope tracking power supply is configured for direct connection to a supply voltage. The direct connection may be made without connection through an intermediate voltage regulator, such as a low drop out regulator. The supply voltage may be a relatively high battery voltage, for example, that would normally result in greater than permissible voltage limits on the transistors used in conventional envelope tracking power supplies.read more
Citations
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Patent
Multi-mode envelope tracking amplifier circuit
TL;DR: In this article, a multi-mode envelope tracking (ET) amplifier circuit is presented, which can operate in a low-resource block (RB) mode, a mid-RB mode, and a high RB mode.
Patent
Reduced bandwidth envelope tracking
TL;DR: In this article, an envelope power converter control signal is provided such that the envelope power supply signal causes the gain of the amplifier to remain substantially constant over a range of input power provided to the amplifier.
Patent
Envelope tracking with reduced dynamic range
TL;DR: In this article, the power converter circuitry is configured to receive an envelope power converter control signal and a supply voltage, and then the envelope power supply signal for an amplifier from the supply voltage and based on the envelope Power Converter Control signal.
Patent
Envelope tracking amplifier circuit
TL;DR: In this article, an envelope tracking (ET) amplifier circuit is described, which includes ET tracker circuitry configured to provide an ET modulated voltage to an amplifier circuit for amplifying a radio frequency (RF) signal.
Patent
Envelope tracking power management circuit
TL;DR: In this article, an envelope tracking power management circuit is described, which consists of a first envelope tracking amplifier and a second receiver, each configured to amplify a respective radio frequency (RF) signal based on a respective supply voltage.
References
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Patent
High efficiency digital transmitter incorporating switching power supply and linear power amplifier
TL;DR: In this paper, the power efficiency improvement mechanism leverages the high efficiency of a switched-mode power supply (SMPS) that supplies the high DC current to the transmitter's power amplifier, while compensating for its limitations using predistortion.
Patent
Semiconductor device and method of manufacturing the same
TL;DR: In this article, a synchronous dynamic random access memory (SDRAM) and a flash memory are built in a single encapsulater, where the flash memory is attached to a main surface of a wiring board in a parallel state, and another SDRAM chip is fixed onto the memory chip.
Patent
Variable supply amplifier system
Ian Stuart Robinson,Frank Winter +1 more
TL;DR: In this article, an envelope profiler analyzes the buffered interval of the input signal and determines an appropriate supply signal profile for the power amplifier over a predetermined time interval, and a supply control provides a supply signal according to the determined profile.
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Power combining power supply system
TL;DR: In this article, a power supply system comprises a low-speed power supply and a high speed power supply configured to operate in first and second frequency ranges, respectively, and generate first output and second output, respectively.
Patent
Method and apparatus for improving the efficiency of power amplifiers, operating under a large peak-to-average ratio
TL;DR: In this article, the authors proposed a method for improving the efficiency and the dynamic range of a power amplifier operated with signals having a large peak-to-average ratio (P2A) in terms of the magnitude of an input signal being a modulated signal that is input to the power amplifier.