H - Electricity – 03 – G
Patent
H - Electricity
03
G
330/39
H03G 3/20 (2006.01) H03G 3/00 (2006.01)
Patent
CA 1270537
ABSTRACT In a digital AGC apparatus, if the numbers of bits in the A/D and the D/A converters are small and the output amplitude variability of the AGC circuit is great, the output amplitude con- trol by the AGC circuit will be rough, and the output of the AGC circuit will fail to be constant, resulting in amplitude modulated signals. If the output is to be finely controlled, the converters will have to be able to handle more bits, which means costlier converters and a more complex controller which is unable to follow abrupt variations in input amplitude caused by fading or some other factor. The AGC apparatus according to the invention com- prises a rectifier for converting the level of a received signal into a D.C. voltage; a first A/D converter for converting the D.C. voltage into a first control signal; a voltage generating circuit responsive to the first control signal and a second control signal for generating an automatic gain control voltage; AGC circuitry responsive to the automatic gain control voltage for controlling the amplitude of the received signal; a detector for envelope- detecting the output of the AGC circuit means; a second A/D con- verter for converting the output of the detector into a digital signal; a digital AGC controller for digitally processing the out- put of the second A/D converter; and a D/A converter for converting the output of the AGC controller into an analog signal and supply- ing the second control signal.
532230
Corporation Nec
Smart & Biggar
LandOfFree
Automatic gain control apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Automatic gain control apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Automatic gain control apparatus will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1331647