| US 7,372,385 B2 | ||
| A/D converter, signal processor, and receiving device | ||
| Takafumi Yamaji, Yokohama (Japan) | ||
| Assigned to Kabushiki Kaisha Toshiba, Tokyo (Japan) | ||
| Filed on Dec. 20, 2006, as Appl. No. 11/613,607. | ||
| Claims priority of application No. P2006-178566 (JP), filed on Jun. 28, 2006. | ||
| Prior Publication US 2008/0001803 A1, Jan. 03, 2008 | ||
| Int. Cl. H03M 3/00 (2006.01) | ||
| U.S. Cl. 341—143 [341/118; 341/120; 341/155] | 20 Claims |
| 1. An A/D converter which converts an analog current signal into a digital signal, comprising:
a filter removing a noise component from the analog current signal to output an analog voltage signal;
a quantizer quantizing the analog voltage signal outputted from said filter to generate the digital signal; and
a D/A converter converting the digital signal generated by said quantizer into an analog feedback current to feedback to an
input of said filter, and supplying a bias current for said D/A converter to an output of a frequency converter via a path
of the analog current signal as a bias current driving the frequency converter outputting the analog current signal.
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