2024年4月26日发(作者：郜智杰)
摘要 本文主要介绍基于大规模集成电路QS7785PF2的功率放大器的设计，它是虚
拟 5.1声道解码器的产品之一。QS7785PF可以将双声道的普通立体声信号或杜比定
向逻辑、DVD（AC-3编码）输出的立体声音乐信号转换成为前左FL、前右FR、中
置C、环绕左SL、环绕右SR、超重低音SW等5.1声道输出，并能够完成多种模式
间的切换、不同音源之间切换的。本设计是在QS7785PF的基础上完善功率放大器其
他外围电路的设计，包括内外部5.1声道的转换功能。消音功能、指示电路及保护电
路等，各个电路均采用了性价比较高的电路方案。
关键词 QS7785PF解码器；QSurround 3D处理技术；虚拟环绕声；双稳态触发器；
AV放大器
Based on QS7785PF encirclement decoder power
amplifier design
Abstract This text mainly is according to the design of the power enlarger of the large
scale integration Audio frequency technique laboratory QSurround patent
tracks technique-5.1 decode the commercial product the of the 7785PF can
double the common and high fidelity signal of the track or ratio definite direction logic,the
DVD(the AC-3 code) output's high fidelity music signal the conversion become ago left
FL,ex- right FR,won to place C,surrounded left SL,surrounded right SR,the excess bass
SW etc.5.1 tracks output, and can complete various modes cut over,different sound source
of cut power enlarger's foundation in the QS7785PF still designed is 5.1
conversion function of the tracks inside the t process and switch on to
eliminate the sound electric circuit and conversion contain the indicator electric circuit,
converting process to adopt to imitate the electronics switch, reducing the machine switch
to the noice that the stereo set bring, and the loudspeaker protect electric circuit to
constitute and so on. Each circuit put to use a lower production cost scheme with high
performance.
Key words The QS7785PF decoding machine，QSurround 3D Processing technology，
Virtual Surround，Bistable flip-flop，Audio Video amplifier
2024年4月26日发(作者：郜智杰)
摘要 本文主要介绍基于大规模集成电路QS7785PF2的功率放大器的设计，它是虚
拟 5.1声道解码器的产品之一。QS7785PF可以将双声道的普通立体声信号或杜比定
向逻辑、DVD（AC-3编码）输出的立体声音乐信号转换成为前左FL、前右FR、中
置C、环绕左SL、环绕右SR、超重低音SW等5.1声道输出，并能够完成多种模式
间的切换、不同音源之间切换的。本设计是在QS7785PF的基础上完善功率放大器其
他外围电路的设计，包括内外部5.1声道的转换功能。消音功能、指示电路及保护电
路等，各个电路均采用了性价比较高的电路方案。
关键词 QS7785PF解码器；QSurround 3D处理技术；虚拟环绕声；双稳态触发器；
AV放大器
Based on QS7785PF encirclement decoder power
amplifier design
Abstract This text mainly is according to the design of the power enlarger of the large
scale integration Audio frequency technique laboratory QSurround patent
tracks technique-5.1 decode the commercial product the of the 7785PF can
double the common and high fidelity signal of the track or ratio definite direction logic,the
DVD(the AC-3 code) output's high fidelity music signal the conversion become ago left
FL,ex- right FR,won to place C,surrounded left SL,surrounded right SR,the excess bass
SW etc.5.1 tracks output, and can complete various modes cut over,different sound source
of cut power enlarger's foundation in the QS7785PF still designed is 5.1
conversion function of the tracks inside the t process and switch on to
eliminate the sound electric circuit and conversion contain the indicator electric circuit,
converting process to adopt to imitate the electronics switch, reducing the machine switch
to the noice that the stereo set bring, and the loudspeaker protect electric circuit to
constitute and so on. Each circuit put to use a lower production cost scheme with high
performance.
Key words The QS7785PF decoding machine，QSurround 3D Processing technology，
Virtual Surround，Bistable flip-flop，Audio Video amplifier