# A digital low-frequency geophone based on 4th-order sigma-delta modulator and single-coil velocity feedback

> Research article (Sensors and Actuators A Physical, 2020) · cited 16× · AI/ML

**Wikidata**: [openalex:W3036740549](https://www.wikidata.org/wiki/openalex:W3036740549)  
**Source**: https://4ort.xyz/entity/a-digital-low-frequency-geophone-based-on-4th-order-sigma-delta-modulator-and-single-coil-velocity-feedback