Equivalent load impedance of pulse width modulation excited band pass filters

2014 ◽  
Vol 25 (2) ◽  
pp. 164-172
Author(s):  
David Seebacher ◽  
Peter Singerl ◽  
Christian Schuberth ◽  
Michael E. Gadringer ◽  
Wolfgang Bösch
Keyword(s):  
Pulse Width ◽  
Pulse Width Modulation ◽  
Load Impedance ◽  
Excited Band ◽  
Band Pass ◽  
Equivalent Load

On Distortion in Digital Microwave Power Amplifiers

Frequenz ◽  
2017 ◽  
Vol 71 (1-2) ◽  
pp. 11-17
Author(s):  
Dhamia Al-Mozani ◽  
Andreas Wentzel ◽  
Wolfgang Heinrich
Keyword(s):  
Output Power ◽  
Frequency Band ◽  
Power Amplifiers ◽  
Microwave Power ◽  
Pulse Width ◽  
Pulse Width Modulation ◽  
Measurement Data ◽  
Digital Modulation ◽  
Delta Sigma ◽  
Band Pass

Abstract In this paper, a first study of distortion in digital power amplifiers (PA) is presented. The work is based on a voltage mode class-S PA with a GaN MMIC for the 900 MHz frequency band. The investigation focuses on the quasi-static amplitude-to-amplitude (AM-AM) and amplitude-to-phase (AM-PM) distortions. Different digital modulation schemes are applied and studied versus output power back-off. This includes two pulse-width modulation (PWM) versions as well as band-pass delta-sigma (BPDS) modulation. The results are verified by measurement data.

The 1-Bit Instrument

2020 ◽  
Vol 1 (1) ◽  
pp. 44-74
Author(s):  
Blake Troise
Keyword(s):  
Pulse Width ◽  
Pulse Width Modulation ◽  
Interleaving Techniques ◽  
Sonic Environment

The 1-bit sonic environment (perhaps most famously musically employed on the ZX Spectrum) is defined by extreme limitation. Yet, belying these restrictions, there is a surprisingly expressive instrumental versatility. This article explores the theory behind the primary, idiosyncratically 1-bit techniques available to the composer-programmer, those that are essential when designing “instruments” in 1-bit environments. These techniques include pulse width modulation for timbral manipulation and means of generating virtual polyphony in software, such as the pin pulse and pulse interleaving techniques. These methodologies are considered in respect to their compositional implications and instrumental applications.

An Equivalent Circuit Model for Vertical Comb Drive MEMS Optical Scanner Controlled by Pulse Width Modulation

2012 ◽  
Vol 132 (1) ◽  
pp. 1-9 ◽  
Author(s):  
Satoshi Maruyama ◽  
Muneki Nakada ◽  
Makoto Mita ◽  
Takuya Takahashi ◽  
Hiroyuki Fujita ◽  
...  
Keyword(s):  
Equivalent Circuit ◽  
Pulse Width ◽  
Pulse Width Modulation ◽  
Equivalent Circuit Model ◽  
Circuit Model ◽  
Comb Drive ◽  
Optical Scanner

Studies on Triangular Reference with Carrier Overlapping Pulse Width Modulation Methods for Diode Clamped Five Level Inverter

2013 ◽  
Vol 1 (1) ◽  
pp. 8-17
Author(s):  
S. Sumathi ◽  
◽  
D. Meena ◽  
C. R. Balamurugan ◽  
S. P. Natarajan ◽  
...  
Keyword(s):  
Pulse Width ◽  
Pulse Width Modulation ◽  
Modulation Methods
Sign in / Sign up

Export Citation Format

Share Document