Demodulators – Frequency modulation demodulator
Reexamination Certificate
2006-01-10
2006-01-10
Kinkead, Arnold (Department: 2817)
Demodulators
Frequency modulation demodulator
C329S318000, C329S319000, C329S320000, C329S323000, C455S266000, C375S324000, C375S350000
Reexamination Certificate
active
06985029
ABSTRACT:
A demodulator has a resistor and a capacitor that may be subject to tolerances. For tolerance correction, the FM demodulator is preferably supplied with a reference frequency, which corresponds to the nominal mid-frequency of the demodulator, which is a function of the resistor and the capacitor. Any discrepancy between the actual mid-frequency of the demodulator and its nominal mid-frequency leads to the production of a voltage that differs from a nominal voltage at the output. A detector detects this error and adjusts the values of the resistor or capacitor until the error between the nominal voltage and the voltage is zero or is a minimum. The described principle can be used, for example, in integrated mobile radio receivers.
REFERENCES:
patent: 4410856 (1983-10-01), van Zanten
patent: 6275542 (2001-08-01), Katayama et al.
patent: 30 48 104 (1981-09-01), None
patent: 36 13 994 (1987-10-01), None
patent: 0 255 175 (1988-02-01), None
patent: 0 574 083 (1993-12-01), None
patent: 0 948 128 (1999-10-01), None
patent: 2 207 284 (1974-06-01), None
patent: 1 455 832 (1976-11-01), None
Hanke Andre
Heinen Stefan
Wagner Elmar
Greenberg Laurence A.
Infineon - Technologies AG
Kinkead Arnold
Locher Ralph E.
Stemer Werner H.
LandOfFree
Circuit configuration for tolerance correction in a... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Circuit configuration for tolerance correction in a..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Circuit configuration for tolerance correction in a... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3597333