Oscillators – Automatic frequency stabilization using a phase or frequency... – Afc with logic elements
Reexamination Certificate
2006-10-31
2006-10-31
Lam, Tuan T. (Department: 2816)
Oscillators
Automatic frequency stabilization using a phase or frequency...
Afc with logic elements
C331S016000, C331S03600C, C331S03600C
Reexamination Certificate
active
07129788
ABSTRACT:
A d.c. signal controlled oscillator includes a frequency-determining network having a control input and a modulation input. A phase regulating loop includes the oscillator and components that provide a control signal to the control input. A circuit apparatus for driving the oscillator includes a modulation generator that provides a modulation signal to the modulation input, and a circuit arrangement that autonomously generates a signal depending on and representing a slope of the modulation and provides this slope signal to the modulation generator, which generates the modulation signal dependent on the slope signal. A method of operating the oscillator involves switching a frequency divider successively to two different frequencies, respectively sampling and holding the two different arising control voltages, forming a difference between the two control voltages, and activating the modulation generator so that a modulation swing of the modulation signal is determined by this difference between the control voltages.
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Modern Dictionary of Electronics by Rudolf F. Graf , 1978, p. 459.
“Bluetooth Single-Chip Transceiver IC” T2901, Atmel Wireless & μc; Rev.A4; Nov. 17, 2000; pp. 1(29) to 29(29).
Eckert Juergen
Fahlbusch Thorsten
Gehring Burkhard
Groh Hans-Werner
Haefner Horst
Atmel Germany GmbH
Fasse W. F.
Fasse W. G.
Lam Tuan T.
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