H - Electricity – 04 – B
Patent
H - Electricity
04
B
325/101
H04B 1/16 (2006.01) H03G 3/20 (2006.01)
Patent
CA 1246149
D-8448 C-3730 AGC VOLTAGE GENERATOR WITH AUTOMATIC RATE SWITCHING Abstract of the Disclosure An AGC voltage generating circuit for an AM radio comprises a product detector adapted to receive an IF signal modulated by an AF signal and synchronously detect the AF signal, a low pass filter adapted to derive from the product detector a filtered voltage indicating the average IF signal strength, and a reference voltage generating circuit ratiometrically related to the low pass filter through a common DC power supply and effective to generate high, medium and low reference voltages ratiometrically related to each other with the high and low reference voltages defining a voltage window about the medium reference voltage. Comparator apparatus is effective to compare the filtered voltage from the low pass filter with the high, medium and low reference voltages from the reference voltage generating circuit. Current source apparatus is reponsive to the comparator apparatus to control the voltage on a capacitor to maintain the filtered voltage equal to the medium reference voltage. The current source apparatus is further responsive to the comparator apparatus to increase the rate of voltage change across the capacitor when the filtered voltage is outside the voltage window compared to the rate when the filtered voltage is within the voltage window. The AGC voltage is derived from the voltage on the capacitor.
507043
Aldridge Fredrick A.
Kennedy Richard A.
General Motors Corporation
Gowling Lafleur Henderson Llp
LandOfFree
Agc voltage generator with automatic rate switching does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Agc voltage generator with automatic rate switching, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Agc voltage generator with automatic rate switching will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1187563