Musical pick-up device with isolated noise cancellation coil
US5569872A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 21, 1994 |
| Grant date | Oct 29, 1996 |
| Priority date | — |
| Expiry date | Sep 21, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10H3/182
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
The present invention relates to a pick-up device for an electric musical instrument having strings. The pick-up device has a primary coil for sensing the vibration of the strings, and a secondary coil for noise cancellation. The secondary coil is isolated from the primary coil by, for example, an operational amplifier. The primary coil operates in a primary circuit, while the secondary coil operates in a noise cancellation circuit. The impedances of the primary circuit are selected to optimize the frequency response of the primary coil. The impedances of the noise cancellation circuit are selected to match the frequency response of the secondary coil to the frequency response of the primary coil.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.