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    • 2. 发明公开
    • 아날로그 클래스 AB 앰프
    • 用于音频的模拟类AB放大器
    • KR1020130011234A
    • 2013-01-30
    • KR1020110072235
    • 2011-07-21
    • 제이에이취엔지니어링주식회사
    • 이승제
    • H03F1/32H03F3/26
    • H03F1/3217H03F1/3276H03F3/26H03F3/45174
    • PURPOSE: An analog class AB amplifier is provided to minimize the cross-over distortion of an output signal by configuring a biasing circuit using a current mirror circuit. CONSTITUTION: A complementary push-pull transistor includes a first transistor(10) and a second transistor(20). The first transistor has a current push function. The second transistor has a current pull function. The first and the second transistors may be a bipolar transistor or a field effect transistor. A biasing circuit minimizes the cross-over distortion of an output signal in an analog class AB amplifier for audio. The biasing circuit includes a first and second diodes(30,40), an upper current mirror circuit(50), a lower current mirror circuit(60).
    • 目的:提供模拟AB类放大器,通过使用电流镜电路配置偏置电路来最小化输出信号的交叉失真。 构成:互补推挽晶体管包括第一晶体管(10)和第二晶体管(20)。 第一晶体管具有电流推送功能。 第二晶体管具有电流拉动功能。 第一和第二晶体管可以是双极晶体管或场效应晶体管。 偏置电路使音频的模拟AB类放大器中的输出信号的交叉失真最小化。 偏置电路包括第一和第二二极管(30,40),上电流镜电路(50),下电流镜电路(60)。
    • 4. 发明公开
    • 트랜스컨덕턴스 회로, 트랜시버에서 구현되는 칩, 및트랜시버
    • 交叉电路
    • KR1020060126955A
    • 2006-12-11
    • KR1020067007019
    • 2004-10-06
    • 에스티 에릭슨 에스에이 엔 리퀴데이션
    • 프뢰우테세바스티앙마리헤르베
    • H03F3/45
    • H03F3/45174H03F2203/45288H03F2203/45352H03F2203/45392
    • The present invention relates to a transconductance circuit intended to convert a differential input voltage, supplied as two signals to two inputs, IN+ and IN- respectively, into a differential output current. According to the invention, each of the two signals of said differential input voltage is supplied to each input, IN+ and IN- respectively, through a follower transistor, TF+ and TF- respectively, connected to said input, IN+ and IN- respectively, by its emitter and receiving said signal on a control electrode. Moreover, each of the two inputs, IN+ and IN- respectively, of the transconductance is connected to a respective current source, CS- and CS+ respectively, that is dynamically controlled by the other input of the transconductance, IN- and IN+ respectively, said current source, CS- and CS+ respectively, being such that the current supplies to each input, IN+ and IN- respectively, by said current source, CS- and CS+ respectively, eliminates current variations caused by voltage variations of the input voltage signal.
    • 本发明涉及一种跨导电路,其旨在将作为两个信号的差分输入电压分别转换成两个输入,即IN +和IN-分别输入到差分输出电流。 根据本发明,所述差分输入电压的两个信号中的每一个分别通过分别连接到所述输入IN +和IN-的跟随器晶体管TF +和TF-分别提供给IN +和IN- 其发射极并在控制电极上接收所述信号。 此外,跨导的两个输入IN +和IN-中的每一个分别连接到相应的电流源CS-和CS +,分别由跨导的另一个输入IN-和IN +动态地控制 分别为电流源CS和CS +,分别由所述电流源CS-和CS +分别向每个输入IN +和IN提供电流消除由输入电压信号的电压变化引起的电流变化。