| US 7,522,080 B2 | ||
| A/D converter, signal processor, and receiving device | ||
| Takafumi Yamaji, Yokohama (Japan) | ||
| Assigned to Kabushiki Kaisha Toshiba, Tokyo (Japan) | ||
| Filed on Mar. 26, 2008, as Appl. No. 12/55,850. | ||
| Application 12/055850 is a continuation of application No. 11/613607, filed on Dec. 20, 2006, granted, now 7,372,385. | ||
| Claims priority of application No. 2006-178566 (JP), filed on Jun. 28, 2006. | ||
| Prior Publication US 2008/0180297 A1, Jul. 31, 2008 | ||
| This patent is subject to a terminal disclaimer. | ||
| Int. Cl. H03M 3/00 (2006.01) | ||
| U.S. Cl. 341—143 [341/118; 341/120; 341/144; 341/155] | 12 Claims |
| 1. A signal processing method, comprising:
frequency converting an analog input signal into an analog current signal, at a frequency converter;
removing a noise component from the analog current signal to output an analog voltage signal, at a filter;
quantizing the analog voltage signal to generate a digital output signal, at a quantizer;
converting the digital output signal into an analog feedback current to feedback to an input of the filter, at a D/A converter;
and
supplying a bias current for the D/A converter to an output of the frequency converter via a path of the analog current signal
as a bias current driving the frequency converter.
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