Title :
Micromechanical mixer and filters
Author :
Ark-Chew Wong ; Hao Ding ; Nguyen, C.T.-C.
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., Michigan Univ., Ann Arbor, MI, USA
Abstract :
A device comprised of interlinked micromechanical resonators with capacitive mixer transducers has been demonstrated to perform both low-loss frequency translation (i.e. mixing) and highly selective filtering of applied electrical input signals. In particular, successful down-conversion of radio frequency (RF) signals from 40-200 MHz and subsequent filtering at a 27 MHz intermediate frequency (IF) with less than 15 dB of combined mixing conversion and filter insertion loss is demonstrated using this single, micromechanical device. Mixing conversion gain/loss is shown to depend upon a ratio of local oscillator amplitude and applied bias voltages. A single-sideband (SSB) noise figure of 18 dB is achieved.
Keywords :
circuit noise; frequency convertors; micromachining; micromechanical resonators; mixers (circuits); 18 dB; 27 MHz; 40 to 200 MHz; SSB noise figure; applied bias voltages; applied electrical input signals; capacitive mixer transducers; down-conversion; insertion loss; interlinked micromechanical resonators; intermediate frequency; local oscillator amplitude; low-loss frequency translation; micromechanical mixer; Filtering; Frequency conversion; Insertion loss; Local oscillators; Micromechanical devices; RF signals; Radio frequency; Resonator filters; Transducers; Voltage-controlled oscillators;
Conference_Titel :
Electron Devices Meeting, 1998. IEDM '98. Technical Digest., International
Conference_Location :
San Francisco, CA, USA
Print_ISBN :
0-7803-4774-9
DOI :
10.1109/IEDM.1998.746400