Negative Group Delay Circuit for Feed-Forward Amplifier

Author

Noto, Hifumi ; Yamauchi, Kazuhisa ; Nakayama, Masatoshi ; Isota, Yoji

Author_Institution

Mitsubishi Electr. Corp., Kamakura

fYear

2007

fDate

3-8 June 2007

Firstpage

1103

Lastpage

1106

Abstract

We present a design and an implementation of a negative group delay circuit, which consists of lumped parameter element. It is very small and simple circuit. The circuit is composed of three resonators with resisters, which are arranged to pi type circuit to improve the reflection. We discuss the principle of a negative group delay circuit and apply the circuit to the feed-forward amplifier. It is confirmed that the delay line of the distortion cancellation loop is shortened 40% by connecting the circuit to the driver stage of the error amplifier. The efficiency of the feed-forward amplifier has been improved from 9% to 12%.

Keywords

delay circuits; feedforward amplifiers; lumped parameter networks; resonators; delay line; distortion cancellation loop; efficiency 12 percent; error amplifier; feed-forward amplifier; lumped parameter element; negative group delay circuit; resonator; Delay lines; Driver circuits; Feedforward systems; Information technology; Joining processes; Metamaterials; RLC circuits; Reflection; Resonance; Resonant frequency; delay line; feed-forward amplifier; metamaterials; negative group delay;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Symposium, 2007. IEEE/MTT-S International

Conference_Location

Honolulu, HI

ISSN

0149-645X

Print_ISBN

1-4244-0688-9

Electronic_ISBN

0149-645X

Type

conf

DOI

10.1109/MWSYM.2007.380286

Filename

4264020