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Browsing by Author "Ferzli, Rony"

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An all-digital fast tracking switching converter with a programmable order loop controller for envelope tracking RF power amplifiers

Harmanani, Haidar M.; Ferzli, Rony; Anabtawi, Nijad (IEEE, 2017-03-28)

This paper presents a step down, switched mode power converter for use in multi-standard envelope tracking radio frequency power amplifiers (RFPA). The converter is based on a programmable order sigma delta modulator that ...
Efficient shaped quantizer dithering implementation for sigma delta modulators

Harmanani, Haidar M.; Ferzli, Rony; Anabtawi, Nijad (IEEE, 2017-03-28)

A well-known limitation of sigma delta modulators is the generation of limit cycle oscillations for DC and slow varying inputs. These limit cycles give rise to undesired tones at the output of the modulator which result ...
An enhanced light-load efficiency step down regulator with fine step frequency scaling

Harmanani, Haidar M.; Ferzli, Rony; Anabtawi, Nijad (IEEE, 2017-03-28)

This paper presents a switching DC-DC Buck converter with enhanced light-load efficiency for use in noise-sensitive applications. Low noise, spur free operation is achieved by using a sigma-delta-modulator (ΣΔ) based ...
A single switcher combined series parallel hybrid envelope tracking amplifier for wideband RF power amplifier applications

Harmanani, Haidar; Ferzli, Rony; Anabtawi, Nijad (IEEE, 2017-03-28)

In this paper, an improved architecture for RF power amplifier envelope tracking supply modulator is presented. It consists of a single switched mode supply regulator and one linear regulator. The switched mode supply ...

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