A New Digital TCXO (Temperature Compensated Crystal Oscillators) Circuit Using a Capacitor-Switch Array,

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Abstract:

Recently, Digital TCXOs have been studied extensively, because of their high stability and rapid start-up time. However, they have the disadvantages of large circuit scale and high power dissipation. To solve these problems, it is necessary to develop an LSI circuit for TCXOs. This paper describes a new digital TCXO structure suitable for a C-MOS integrated circuit. A new and simple temperature compensation algorithm is also proposed. The TCXO circuit proposed here has a new crystal oscillation circuit directly controlled by a digital signal. This makes it possible to eliminate DA converter and varactor diode used in conventional digital TCXOs. The new oscillation circuit is composed of an amplifer, a quartz resonator and a capacitor-switch array.

Author(s):
Uno, T. ; Shimoda, Y.
Author Organization(s):
NIPPON TELEGRAPH AND TELEPHONE PUBLIC CORP TOKYO MUSASHINO ELECTRICAL COMMUNICATION LAB
Supplementary Note:
This article is from the Proceedings of the Annual Symposium on Frequency Control (37th), 1-3 Jun 83, Marriott Hotel, Philadelphia, Pennsylvania, AD-A136 673, p434-441.
Pagination:
0008

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Subject Terms
Joint Capability Areas:
JCA_6.1.3_Switching and Routing
Communities of Interest:
Energy and Power Technologies
Descriptor(s):
*Crystal oscillators, *Integrated circuits, *Digital systems, Circuit analysis, Capacitors, Switches, Arrays, Temperature, Stability
Keyword(s):
Component Reports, TCXO(Temperature Compensated Crystal Oscillators)
Report Date:
1982 Jan 01