METHOD AND APPARATUS FOR SUBSTANTIALLY IMPROVING POWER SUPPLY REJECTION PERFORMANCE IN A MINIATURE MICROPHONE ASSEMBLY
摘要
<p>A hybrid circuit (300) for use in a miniature microphone assembly (100) reduces power supply noise on the audio signal input (214) of an impedance buffer amplifier (200) using one or both of shielding conductors (422, 424) to reduce parasitic capacitance between signal (418) and power supply (420) conductors. A ground plane (424), an interposing conductor (422) and combinations thereof are selectively placed and coupled to either ground (232) or a low impedance signal node (216) to reduce or eliminate the undesirable parasitic capacitance.</p>
申请公布号
WO2004098237(A1)
申请公布日期
2004.11.11
申请号
WO2004US13011
申请日期
2004.04.28
申请人
KNOWLES ELECTRONICS, LLC;BOOR, STEVEN, E.;MITCHELL, FRANK, R.