发明名称 |
Multi-channel power amplifier with channels independently self-configuring bridge or single-ended output, particulary for audio applications |
摘要 |
A multi-channel power amplifier for driving a plurality of loads, each associated to a respective channel, each channel comprising a pair of operational amplifiers, first and second, one operational amplifier of each channel being connectable by configuring switches either in a bridge configuration with the other operational amplifier or in single-ended configuration to a constant reference voltage output by a dedicated voltage buffer of the multi-channel amplifier for driving the respective load of the channel, comprises a window comparator for monitoring the level of the input signal of the channel and producing a logic control signal for the configuring switches. <??>Each channel has a dedicated window comparator monitoring the level of the input signal of the channel that generates a logic signal for positioning the switches that configure the output power structure of the channel in single-ended or bridge configuration. Moreover, instead of configuring one of the operational amplifiers to function as a reference voltage buffer when switching to a single-ended configuration, a distinct voltage reference buffer is employed, to which any single-ended channel of the multi-channel amplifier is connected. <IMAGE>
|
申请公布号 |
EP1487100(A1) |
申请公布日期 |
2004.12.15 |
申请号 |
EP20030425358 |
申请日期 |
2003.06.09 |
申请人 |
STMICROELECTRONICS S.R.L. |
发明人 |
BOTTI, EDOARDO;CAGNETTI, FABIO |
分类号 |
H03F1/02;H03F1/32;H03F3/68;H03F3/72;(IPC1-7):H03F3/68 |
主分类号 |
H03F1/02 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|