| US 7,535,290 B2 | ||
| AM radio receiving circuit | ||
| Yasuji Saito, Gunma (Japan); and Masanori Kudo, Gunma (Japan) | ||
| Assigned to Sanyo Electric Co., Ltd., Osaka (Japan) | ||
| Filed on Jul. 19, 2006, as Appl. No. 11/458,623. | ||
| Claims priority of application No. 2005-208652 (JP), filed on Jul. 19, 2005. | ||
| Prior Publication US 2007/0018868 A1, Jan. 25, 2007 | ||
| Int. Cl. H03D 1/00 (2006.01) | ||
| U.S. Cl. 329—349 [329/347; 375/346; 455/303] | 11 Claims |
| 1. An AM radio receiving circuit comprising:
a front end circuit that converts an input AM modulation signal to an intermediate frequency signal, which is output;
a pulse noise detecting circuit that detects pulse noise included in the AM modulation signal;
a pulse noise removing circuit that removes the pulse noise included in the intermediate frequency signal output from the
front end circuit based on the detection result of the pulse noise detecting circuit to output the signal;
a detecting circuit that detects the intermediate frequency signal output from the pulse noise removing circuit after removing
the pulse noise to output an audio signal; and
a high band component removing circuit that removes a high band component included in the intermediate frequency signal output
from the front end circuit to output the signal,
wherein the pulse noise removing circuit removes the pulse noise included in the intermediate frequency signal output from
the high band component removing circuit to output the signal.
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