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    AMPLIFIERS
    31.
    发明专利
    AMPLIFIERS 未知

    公开(公告)号：GB2217541A

    公开(公告)日：1989-10-25

    申请号：GB8908508

    申请日：1989-04-14

    Applicant: MOTOROLA INC

    Inventor： MCGINN MICHAEL

    IPC: H03F1/32 ,  H03F3/45

    Abstract: A wideband linearized amplifier includes first and second differential amplifier sections each including differentially connected first and second pairs of transistors and a linearizing element coupled between the emitters of first ones of the second pair of transistors of each of the first and second differential amplifier sections which cancels the non-linear effects of the base-emitter junctions of the transistors of the amplifier. The bases of the first pair of transistors of the first and second differential amplifier sections are respectively coupled to differential inputs of the amplifier while the bases of the second pair of transistors of the first and second differential amplifier sections are coupled to a reference potential. The collectors of the first pair of transistors and the first transistor of the second pair of transistors of the first differential amplifier section and the collector of the second one of the second pair of transistors of the second differential amplifier section are coupled to a first output of the amplifier while the collectors of the first pair of transistors and the first one of the second pair of transistors of the second differential amplifier section and the collector of the second one of the second pair of transistors of the first differential amplifier section are coupled to a second output of the amplifier.

    HORIZONTAL OSCILLATOR
    32.
    发明专利
    HORIZONTAL OSCILLATOR 未知

    公开(公告)号：DE3176995D1

    公开(公告)日：1989-04-06

    申请号：DE3176995

    申请日：1981-10-28

    Applicant: MOTOROLA INC

    Inventor： MCGINN MICHAEL

    IPC: H03K3/023 ,  H03K3/0231 ,  H03K4/50 ,  H03K4/501 ,  H03K4/502 ,  H04N3/16

    Abstract: A horizontal oscillator for a television receiver includes an on chip nitride capacitor. The circuit includes a reference current amplifier which generates a low temperature coefficient reference current. By varying the gain of a current mirror circuit, the reference current is split to produce a small charge/discharge current. A resistive bias chain and first and second capacitors are employed to fix the upper and lower peak voltages of the oscillator output ramp signal.

    BALANCED VARIABLE REACTANCE CIRCUIT AND METHOD OF PRODUCING THE SAME.
    34.
    发明公开
    BALANCED VARIABLE REACTANCE CIRCUIT AND METHOD OF PRODUCING THE SAME. 失效
    具有可调电抗及其生产工艺平衡电路。

    公开(公告)号：EP0225332A4

    公开(公告)日：1988-09-28

    申请号：EP86902243

    申请日：1986-03-27

    Applicant: MOTOROLA INC

    Inventor： LUNN GERALD K ,  MAIN ERIC W ,  MCGINN MICHAEL

    IPC: H03H11/46 ,  H03H11/48

    CPC classification number: H03H11/483

    Abstract: A variable reactance, the value of which is controllable, is produced between a pair of terminals (60, 62) of a variable reactance circuit (100) comprising a pair of current steering circuits (42, 44). First (72) and second (82) reactive components are coupled respectively between the pair of terminals and the first and second current steering circuits to produce first and second antiphase reactive currents. The first reactive current is split by the first current steering circuit into first and second antiphased proportional currents. Likewise, the second reactive current is split by the second current steering circuit into third and fourth antiphased proportional currents with said first and third currents being antiphased with respect to each other. The first reactive current is summed at a first one of the pair of terminals with said first and third currents while the second reactive current is summed at the second one of the pair of terminals with said second and fourth currents to produce the variable reactance across the terminals.

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