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    • 3. 发明公开
    • 위상 변환기
    • 相变器
    • KR1020100019779A
    • 2010-02-19
    • KR1020080078497
    • 2008-08-11
    • 삼성전기주식회사고려대학교 산학협력단
    • 민준기김문일이국주박형진이동호김기홍황성호박용운
    • H03D7/16H03D7/12H03D7/00
    • PURPOSE: A phase shifter using an amplifier as a switch is provided to operate a switch function in a high frequency region without a high loss by maintaining a difference between isolation rates in a on state and a off state. CONSTITUTION: A plurality of conductive lines(111,112,113) has a different electrical length. A plurality of input amplifiers(121,122,123) are one by one connected between one side of each conductive line and an input terminal(101). Each input amplifier switches the corresponding conductive line to the input terminal by a DC power supply. The gains of input amplifiers are respectively differently formed. The input amplifier comprises the CMOS FET. The CMOS FET comprises the common source CMOS FET.
    • 目的:提供使用放大器作为开关的移相器,通过保持导通状态和断开状态下的隔离率之间的差异,在高频区域中操作开关功能而没有高损耗。 构成:多条导线(111,112,113)具有不同的电长度。 多个输入放大器(121,122,123)逐个连接在每条导线的一侧和输入端(101)之间。 每个输入放大器通过直流电源将相应的导线切换到输入端。 输入放大器的增益分别不同。 输入放大器包括CMOS FET。 CMOS FET包括公共源CMOS FET。
    • 5. 发明公开
    • 다단 증폭 회로
    • 多级放大器电路
    • KR1020100079536A
    • 2010-07-08
    • KR1020080138058
    • 2008-12-31
    • 고려대학교 산학협력단
    • 김문일박형진
    • H03F1/22H03F3/68
    • H03F1/223H03F1/0266H03F1/56H03F3/602
    • PURPOSE: A multi-stage amplifier circuit is provided to improve amplifying efficiency by minimizing direct-bias networks which are repeated in each transistor. CONSTITUTION: An input direct-current bias network(31) is provided to an amplifier. A base common amplifying unit(32) includes a plurality of transistors which is connected to the network. An output direct-current bias network(33) is connected with the base common amplifying unit. A pair of direct current pads(34) supplies power to a multi-stage amplifying circuit. The base common amplifying unit includes an emitter and a plurality of transistors.
    • 目的:提供多级放大器电路,通过最小化在每个晶体管中重复的直接偏置网络来提高放大效率。 构成:向放大器提供输入直流偏置网络(31)。 基本公共放大单元(32)包括连接到网络的多个晶体管。 输出直流偏置网络(33)与基本公共放大单元连接。 一对直流焊盘(34)向多级放大电路供电。 基本公共放大单元包括发射极和多个晶体管。