发明名称 |
Continuous-time integrating filter with minimum phase variation, and bandpass sigma delta modulator using such a filter |
摘要 |
The disclosure pertains to continuous-time filtering. More particularly, it relates to filtering in a feedback control loop, for example in a sigma-delta (SigmaDelta) modulator. The making of a filter for this type of application comes up against a major problem linked to the relativity between the amplitude and phase responses. This limits the possibilities of choice in order to take steps against the instability of the loop. A continuous-time filter with minimum phase variation carries out the bandpass integration of the signal presented at its input. The making of the continuous-time filter as a bandpass integrator raises the problem of achieving a compromise between gain variations and phase variations close to the -1 critical point, This compromise must lead to the stability of the loop. This problem is resolved by using a continuous-time bandpass integrating filter comprising at least one resonance device with minimum phase variation.
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申请公布号 |
US2004041665(A1) |
申请公布日期 |
2004.03.04 |
申请号 |
US20030382097 |
申请日期 |
2003.03.06 |
申请人 |
HODE JEAN-MICHEL;FLOUZAT CHRISTOPHE;DE GOUY JEAN-LUC |
发明人 |
HODE JEAN-MICHEL;FLOUZAT CHRISTOPHE;DE GOUY JEAN-LUC |
分类号 |
H03H7/075;H03H7/01;H03H7/06;H03H7/42;H03H9/54;H03H9/60;H03M3/02;H03M3/04;(IPC1-7):H03H7/01 |
主分类号 |
H03H7/075 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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