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公开(公告)号:US07602246B2
公开(公告)日:2009-10-13
申请号:US10932545
申请日:2004-09-01
申请人: Xuejun Zhang , Jianjun Zhou
发明人: Xuejun Zhang , Jianjun Zhou
CPC分类号: H03F3/211 , H03F1/42 , H03F3/45179 , H03F2200/294 , H03F2200/36 , H03F2200/372 , H03F2200/39 , H03F2203/45481 , H03G1/0023
摘要: A single-stage amplifier includes (1) first and second “gain” transistors coupled in a common source configuration, (2) first and second resistors providing self-biasing for the first and second transistors, respectively, (3) first and second current sources providing bias currents for the first and second transistors, respectively, and (4) a load impedance coupled between the drains of the first and second transistors. The amplifier may further include (5) third and fourth “compensation” transistors coupled in parallel with, and used to compensate parasitic capacitances of, the first and second transistors, respectively, and (6) third and fourth resistors providing self-biasing for the third and fourth transistors, respectively. Variable gain may be achieved by varying the bias currents for the gain transistors. A two-stage amplifier may be formed with two stages coupled in cascade, with each stage including most or all of the circuit elements of the single-stage amplifier.
摘要翻译: 单级放大器包括(1)以公共源配置耦合的第一和第二“增益”晶体管,(2)分别为第一和第二晶体管提供自偏压的第一和第二电阻器,(3)第一和第二电流 源极分别为第一和第二晶体管提供偏置电流,以及(4)耦合在第一和第二晶体管的漏极之间的负载阻抗。 放大器还可以包括(5)分别与第一和第二晶体管并联耦合并用于补偿第一和第二晶体管的寄生电容的第三和第四“补偿”晶体管,以及(6)第三和第四电阻器为 第三和第四晶体管。 可以通过改变增益晶体管的偏置电流来实现可变增益。 可以形成两级放大器,其级联耦合两级,每级包括单级放大器的大部分或全部电路元件。
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公开(公告)号:US06531860B1
公开(公告)日:2003-03-11
申请号:US09882443
申请日:2001-06-14
IPC分类号: G01R144
CPC分类号: G01R21/14 , H03G3/04 , H03G3/3036
摘要: A power detector (50) detects a power level of an amplified signal (S20) produced by a power amplifier (16) on the same integrated circuit (100). The power detector compensates for an effect of temperature variations on the magnitude of the detected power level.
摘要翻译: 功率检测器(50)检测由同一集成电路(100)上的功率放大器(16)产生的放大信号(S20)的功率电平。 功率检测器补偿温度变化对检测到的功率电平的幅度的影响。
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