50 GHz resonant tunneling diode relaxation oscillator

Author

Chahal, Prem ; Morris, Frank ; Frazier, Gary

Author_Institution

Raytheon Co., Dallas, TX, USA

fYear

2004

fDate

21-23 June 2004

Firstpage

241

Abstract

InAlAs/AlAs based RTDs with a peak current density over 500 kA/cm² have been designed and fabricated. Relaxation oscillator circuits for 20 and 50 GHz were designed using these 0.6 μm² RTDs. They consist of an RTD and a 5 Ω resistor placed in a coplanar waveguide (CPW). The measured spectrum of the 20 GHz and 50 GHz oscillators showed only odd harmonics. The measured results of the relaxation oscillators show that they have very low phase noise (low jitter), below -110 dBc/Hz at 1 MHz offset in locked-mode, and can easily be phase locked. RTD based relaxation oscillation can be readily used as clocks in high-speed signal processing applications.

Keywords

coplanar waveguide components; microwave oscillators; millimetre wave oscillators; phase locked oscillators; phase noise; relaxation oscillators; resistors; resonant tunnelling diodes; timing jitter; 20 GHz; 5 ohm; 50 GHz; CPW; InAlAs-AlAs; RTD relaxation oscillator; coplanar waveguide; high-speed signal processing clocks; low jitter; low phase noise; odd harmonics spectrum; phase locked mode; resistor; resonant tunneling diode; Circuits; Coplanar waveguides; Current density; Diodes; Indium compounds; Noise measurement; Oscillators; Phase measurement; Resistors; Resonant tunneling devices;

fLanguage

English

Publisher

ieee

Conference_Titel

Device Research Conference, 2004. 62nd DRC. Conference Digest [Includes 'Late News Papers' volume]

ISSN

1548-3770

Print_ISBN

0-7803-8284-6

Type

conf

DOI

10.1109/DRC.2004.1367887

Filename

1367887