By Topic

High frequency fundamental VCXO for SDH system

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$33 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

3 Author(s)
O. Ishii ; Toyo Commun. Equipment Co. Ltd., Kanagawa, Japan ; T. Shibata ; T. Ohshima

This paper describes a high frequency fundamental (HFF) crystal resonator in the frequency range from 156 MHz to nearly 1 GHz, which is fabricated by an industrial photolithographic batch manufacturing process with chemical etching. It also describes a 156 MHz voltage controlled crystal oscillator (VCXO) and a 622 MHz VCXO employing the prototype HFF crystal resonators developed for SDH (synchronous digital hierarchy) system. The 155 MHz HFF-VCXO has been constructed in an industrially standardized 14-pin dual in-line package (DIP) of 20.8 mm×13.2 mm×7.1 mm (volume 1.4 cc) that is one-seventh as big as that of a conventional third overtone mode VCXO. It is composed of a prototype 156 MHz HFF crystal resonator, an emitter coupled logic (ECL) IC and a varactor diode. It still provides the same characteristic as a conventional oscillator. Also, a compact 622 MHz HFF-VCXO with ECL level output has been developed utilizing the same circuit and package as those of the 156 MHz HFF-VCXO, which provides a frequency deviation of approximately ±150 ppm versus control voltage change at 2.5 V±2 V, and then, a temperature frequency stability of less than ±50 ppm over the range from -40°C to +85°C

Published in:

Frequency Control Symposium, 1996. 50th., Proceedings of the 1996 IEEE International.

Date of Conference:

5-7 Jun 1996