| 发明名称 |
METHOD FOR DESIGNING BAND PASS DELTA-SIGMA MODULATOR, BAND PASS DELTA-SIGMA MODULATOR, SIGNAL PROCESSING DEVICE, AND RADIO TRANSCEIVER |
| 摘要 |
To obtain a band pass delta sigma modulator (excluding θ0−±(π/2)×n; n is an integer being 1 or greater) for a desired frequency by replacing z in a z domain model of a low pass delta-sigma modulator with z′ below:;z′=fcnv(z,θ0), whereinfcnv(z, θ0) is a function in which the absolute value of fcnv(z, θ0) is always 1 for any z and θ0,;θ0=2π×(f0/fs),fs is a sampling frequency, andf0 is a center frequency of a quantization noise stop band of the band pass delta-sigma modulator. |
| 申请公布号 |
US2014198878(A1) |
申请公布日期 |
2014.07.17 |
| 申请号 |
US201414217696 |
申请日期 |
2014.03.18 |
| 申请人 |
SUMITOMO ELECTRIC INDUSTRIES, LTD. |
发明人 |
MAEHATA Takashi |
| 分类号 |
H03M3/00;H04L25/08;H04L25/03;G06F17/50 |
主分类号 |
H03M3/00 |
| 代理机构 |
|
代理人 |
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| 主权项 |
1. A method for designing a band pass delta-sigma modulator, the method comprising:
obtaining a band pass delta-sigma modulator (excluding θ0=±(π/2)×n; n is an integer being 1 or greater), by replacing z in a z domain model of a low pass delta-sigma modulator with z′ below:
z′=fcnv(z,θ0), wherein fcnv(z, θ0) is a function in which an absolute value of fcnv(z, θ0) is always 1 for any z and θ0,
θ0=2π×(f0/fs), fs is a sampling frequency, and f0 is a center frequency of a quantization noise stop band of the band pass delta-sigma modulator. |
| 地址 |
Osaka JP |
