Modulators – Frequency modulator – Plural modulation
Reexamination Certificate
2006-04-06
2009-06-16
Pascal, Robert (Department: 2817)
Modulators
Frequency modulator
Plural modulation
C375S297000, C455S102000, C455S108000
Reexamination Certificate
active
07548133
ABSTRACT:
To modulate the frequency of a signal to be transmitted, the biasing voltage applied to a terminal of a transistor is dynamically modulated. To achieve this, the pulse width or a pulse amplitude of a control signal is modulated. Alternatively, a multi-bit control signal may be used to perform the modulation. The frequency of the transmitted signal is optionally modulated by varying the temperature of a oscillator. To vary this temperature, the current flowing through one or more resistive elements positioned in proximity of the oscillator is varied in response to the pulse width or amplitude of a second control signal. The temperature may also be changed by varying a multi-bit control signal. As the level of this current flow varies, the amount of heat emitted by the resistors vary, thereby changing the temperature of the oscillator which has a non-zero temperature coefficient.
REFERENCES:
patent: 3731201 (1973-05-01), Frisbie
patent: 4635296 (1987-01-01), Dinsmore
patent: 4896372 (1990-01-01), Weaver
patent: 5917346 (1999-06-01), Gord
patent: 6404357 (2002-06-01), Taunton
patent: 7123664 (2006-10-01), Matero
patent: 2004/0213351 (2004-10-01), Shattil
patent: 2007/0014382 (2007-01-01), Shakeshaft et al.
Allen Kenneth R.
Goodley James E
Pascal Robert
Preco Electronics, Inc.
Townsend and Townsend / and Crew LLP
LandOfFree
Modulation of an RF transmit signal does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Modulation of an RF transmit signal, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Modulation of an RF transmit signal will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4138560