Oscillators – With device responsive to external physical condition – Temperature or light responsive
Patent
1994-02-18
1995-12-05
Pascal, Robert J.
Oscillators
With device responsive to external physical condition
Temperature or light responsive
331108R, 331172, H03L 724
Patent
active
054732867
ABSTRACT:
A microwave generator has its microwave frequency optically phase-locked by means of a reference frequency of a reference signal, wherein at least one portion of an electronic circuit arrangement is supplied with an optical reference carrier signal modulated with the reference frequency. The circuit arrangement (16) includes two components (Q1 to Q6; Q10, Q11) based on different semiconductor types which are chosen so that one of them, the first component, which is of a first semiconductor type, optically responds to the reference carrier signal (3) and, thus, to the reference frequency (f.sub.1 Mod1. . . Modn) for achieving synchronization, and that--independently of the response of the first component--the other, second component, which is of a second semiconductor type, responds to an optical control carrier signal (6) differing in frequency from the reference carrier signal (3). The amplitude of the first component is controlled by means of a control signal (7) modulated onto the optical control carrier signal (6).
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patent: 5347235 (1994-09-01), Higgins et al.
"Direct Optical Injuction-Locking and Tuning of CW Oscillators", R. Simons, Optical Control of Microwave Devices, Artech House, 1990 Boston & London, Chapter 10, Sec. 10.5, pp. 213 et. seq.
"Initial Observations of Optical Injection Locking of Oscillators Using Heterojunction Bipolar Transistors", A. Bangert et al, Electronics Letters, vol. 28, No. 7, Mar. 26, 1992, Stevenage, Herts, GB, pp. 621-623.
"Optical Phase Control of an Optically Injection-Locked FET Microwave Oscillator", R. Esman et al, IEEE Transactions of Microwave Theory and Techniques, vol. 37, No. 10, Oct. 1, 1989, New York, pp. 1512-1518.
ALCATEL N.V.
Pascal Robert J.
Vu David H.
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