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A novel supply modulation scheme for envelope tracking for a power amplifier in a transmitter is proposed, which follows a control principle that is fundamentally different from the existing ones. Instead of regulating the supply modulator's output in accordance with a given reference signal, the system utilizes a look‐ahead window and synthesizes pulses for the supply modulator such that its output...
A new efficiency improvement technique is proposed for Doherty power amplifiers (PA), which combines supply switching with load modulation. The proposed technique was demonstrated with a commercial prototype GaN PA. Measurement and simulation results for the Doherty PA, using a 5 MHz LTE signal, showed that the proposed technique significantly improved the average power-added efficiency (PAE) to ~55...
The increasing complexity of analog design for SoCs has become a bottleneck due to the lack of established design automation flows. Consequently, reuse of analog design IP (intellectual property) is becoming increasingly prevalent in the semiconductor industry. Traditional design reuse approaches still require a considerable amount of a designer's time for a new set of specifications or migration...
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