Invention Grant
- Patent Title: Noise-canceling frequency-to-digital converters
- Patent Title (中): 降噪频率到数字转换器
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Application No.: US12182457Application Date: 2008-07-30
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Publication No.: US08295416B2Publication Date: 2012-10-23
- Inventor: Paul Cheng-Po Liang
- Applicant: Paul Cheng-Po Liang
- Applicant Address: JP Osaka
- Assignee: Panasonic Corporation
- Current Assignee: Panasonic Corporation
- Current Assignee Address: JP Osaka
- Main IPC: H03D1/04
- IPC: H03D1/04

Abstract:
Methods and apparatuses for reducing noise in frequency to digital converters (FDCs). An FDC apparatus includes a first FDC, a second FDC and a combiner. The first and second FDCs are configured to independently sample an input signal according to a sample clock to generate first and second digital signals, each representing the instantaneous frequency of the input signal. The combiner is configured to form a resultant digital signal from the first and second digital signals. The first and second FDCs are designed and combined in the noise-canceling FDC apparatus so that the first and second signals they generate have correlated noise profiles in a frequency range of interest. When combined by the combiner to form the resultant digital signal, the resultant digital signal has a signal power to noise power ratio greater than the signal power to noise power ratios characterizing the first and second digital signals of the individual first and second FDCs.
Public/Granted literature
- US20100027725A1 NOISE-CANCELING FREQUENCY-TO-DIGITAL CONVERTERS Public/Granted day:2010-02-04
Information query
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