Title:
ADAPTIVE-SNR ULTRA-LOW-POWER ULTRA-LOW-NOISE MICROPHONE
Document Type and Number:
WIPO Patent Application WO/2017/009774
Kind Code:
A3
Abstract:
A microphone circuit including a JFET or MOSFET transistor, one input of an impedance network connected to the transistor's gate, a terminal of a source resistor connected to the transistor's source, another terminal of the source resistor connected to ground, a bypass capacitor connected in parallel to the source resistor, one terminal of a load resistor connected to the transistor's drain, VCC_LOW connected to another terminal of the load resistor, an input of an op-amplifier connected to the transistor's source through a bi-directional low-pass-filter, another input of the op-amplifier connected to reference voltage, an output of the op-amplifier connected to another terminal of the input impedance network through an LPF, an energy detector connected to the transistor's drain via a coupling capacitor, an LPF connected to the energy detector output, and an LPF connected to the output of the energy detector, the input impedance network connected to a microphone.
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Inventors:
GABAI OZ (IL)
Application Number:
PCT/IB2016/054152
Publication Date:
March 23, 2017
Filing Date:
July 12, 2016
Export Citation:
Assignee:
WIZEDSP LTD (IL)
International Classes:
H04R3/04; H04R3/06; H04R3/08; H04R3/10; H04R19/01
Domestic Patent References:
| WO2015097681A2 | 2015-07-02 |
Foreign References:
| US20110150243A1 | 2011-06-23 | |||
| US20150137834A1 | 2015-05-21 | |||
| US7945233B2 | 2011-05-17 | |||
| US8515100B2 | 2013-08-20 |
Attorney, Agent or Firm:
SWIRSKY, Daniel (IL)
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