A Low-Pass Filter Type of Delta Modulation

Author

Toshihiko Yamawaki ; Taikyu Kim

Author_Institution

Department of Electrical Engineering and, Electronics, College of Science and Engineering, Aoyama Gakuin University, 6-16-1 Chitosedai, Setagaya-ku, Tokyo 157, Japan

Issue

2

fYear

1978

fDate

3/1/1978 12:00:00 AM

Firstpage

393

Lastpage

400

Abstract

A new method is presented for the analysis and design of a lowpass filter type of delta modulation. This system has a nonideal integrator acting as a low-pass filter in the signal band and is suited for dc transmission. Analyses are made of overload performances and signal-to-noise ratio (SNR) for sinusoidal inputs and of periodic noises for dc inputs. Point transformations, defined in the phase plane, permit us to describe algebraically the dc response of the modulator and to analyze its dc characteristics. In the results section, it is shown that asymmetric quantization contributes to improving SNR at low signal levels. A simple design method, specified with equivalent bandwidth, desired SNR, and dynamic range, is proposed and verified with experimental results obtained for a design example.

Keywords

Bandwidth; Delta modulation; Design methodology; Dynamic range; Low pass filters; Performance analysis; Phase modulation; Quantization; Signal analysis; Signal to noise ratio;

fLanguage

English

Journal_Title

Aerospace and Electronic Systems, IEEE Transactions on

Publisher

ieee

ISSN

0018-9251

Type

jour

DOI

10.1109/TAES.1978.308669

Filename

4101974