A power amplifier (figure 1) for a parametric loudspeaker system which utilizes switch-mode power conversion (110) to increase efficiency. The power amplifier is configured to coordinate the switching frequency of the amplifier with the carrier frequency of the parametric loudspeaker system, so a lower switching frequency may be used even though the power amplifier must amplify ultrasonic signals. The amplifier can be further optimised to counteract the reactance of the transducer load (118) at the carrier frequency.
申请公布号
WO0205588(A2)
申请公布日期
2002.01.17
申请号
WO2001US21749
申请日期
2001.07.11
申请人
AMERICAN TECHNOLOGY CORPORATION;BANK, JEEVAN, G.;CROFT, JAMES, J., III