Telecommunications – Receiver or analog modulated signal frequency converter – Convertible to different type
Patent
1991-07-31
1994-04-12
Eisenzopf, Reinhard J.
Telecommunications
Receiver or analog modulated signal frequency converter
Convertible to different type
455144, 360 68, 307491, 381123, H04B 1702
Patent
active
053033973
ABSTRACT:
A semiconductor integrated circuit includes a first circuit and a second circuit. The first circuit is set into an operative state in a first mode and into a non-operative state in a second mode, and the transfer characteristic thereof depends on an externally attached impedance circuit. The second circuit is set into an operative state in the second mode and into a non-operative state in the first mode. A resistor is externally connected to the second circuit. A third circuit for keeping a voltage applied across the resistor constant and deriving a current flowing in the resistor in the first mode irrespective of the presence or absence and the magnitude of a voltage applied to one end of the resistor is provided in the first circuit. The resistor is commonly used by the first circuit and the second circuit.
REFERENCES:
patent: 4201946 (1980-05-01), McFayden
patent: 4423442 (1983-12-01), Bitting et al.
patent: 4453135 (1984-06-01), Mattfeld et al.
"An AM/FM Radio Subsystem IC" IEEE Transactions, May 1977; Blaser et al; pp. 129-135.
Toshiba General Audio IC Data Book '90; pp. 321-329, TA8189N.
Eisenzopf Reinhard J.
Faile Andrew
Kabushiki Kaisha Toshiba
LandOfFree
Semiconductor integrated circuit containing a circuit having an does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Semiconductor integrated circuit containing a circuit having an , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Semiconductor integrated circuit containing a circuit having an will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2106966