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    • 54. 发明公开
    • Merged current clamp in triple-input transconductor, for use in oscillator
    • 跨导放大器具有三个输入和用于在振荡器使用稠合电流钳位电路。
    • EP0484031A2
    • 1992-05-06
    • EP91309742.4
    • 1991-10-22
    • AT&T Corp.
    • Khoury, John Michael
    • H03F3/45H03B5/20
    • H03B5/20H03B27/00H03B2200/0058H03B2200/0062H03B2200/0078H03B2200/0092H03B2201/02
    • A clamped linear transconductance amplifier path, consisting essentially of a current clamp (M23) merged in a linear transconductance amplifier (M23, M21,M22) path, is used in a triple-input, single-output transconductor (200). In a balanced transconductor in CMOS technology, this clamped linear transconductance amplifier path is formed by a p-channel MOS transistor (M23) separately connected in series with each of a matched pair of p-channel MOS transistors (M21, M22). The clamped linear transconductance amplifier path, together with two other transconductance paths (M15-M20; M9-M14), can be interconnected to form the input side of the triple-input, single-output transconductor (200). By summing and integrating the outputs of the input side of the triple-input transconductor (200), the output (VOUT,P and VOUT,N) of the output side of the transconductor can be formed. By feeding back this output to the input side of the transconductor (200), an oscillator can obtained.
    • 夹紧线性跨导放大器路径,基本上由电流钳(M23)的以线性跨导放大器(M23,M21,M22)的路径,是在三输入,三输出跨导器(200)使用合并。 在CMOS技术中一个平衡跨,此夹紧线性跨导放大器路径由一个p沟道MOS晶体管(M23)分别串联连接各一对匹配的p沟道MOS晶体管(M21,M22)的形成。 被夹紧的线性跨导放大器路径,与其他在一起的两个跨导路径(M15-M20; M9-M14),可以相互连接以形成三输入的输入侧,三输出跨导器(200)。 通过求和与INTEGRA婷三重输入跨(200)的输入侧的输出,跨导器的输出侧的输出(VOUT,P和V OUT,N)可以被形成。 通过反馈该输出到振荡器的跨导器(200)的输入侧可以得到。
    • 60. 发明授权
    • CONTROLLABLE OSCILLATOR
    • 应税OSC
    • EP1380099B1
    • 2007-08-29
    • EP02732619.8
    • 2002-04-12
    • Semiconductor Ideas to The Market (ItoM) BVKasperkovitz, Wolfdietrich Georg
    • KASPERKOVITZ, Wolfdietrich, Georg
    • H03B5/20
    • H03B5/20
    • Controllable oscillator circuit comprising a regenerative loop which incorporates a cascade circuit of first and second sections each having a controllable gain and a phase shift which is 90° at the oscillation frequency, the first and second sections comprising first and second transconductance amplifiers, respectively, outputs of which are coupled to third and fourth transconductance amplifiers, which are positively fed back from the output to the input, and via first and second capacitors to inputs of the second and first gain controlled amplifiers, said first and second capacitors being coupled in parallel to first and second load resistors, respectively, a tuning control current being supplied to control inputs of the first and second transconductance amplifiers, the output of at least one of the first and second transconductance amplifiers being coupled to an amplitude detection arrangement providing a gain control current for an automatic gain control to control inputs of the third and fourth transconductance amplifiers, said first and third transconductance amplifiers of the first section having a differential pair of first and second output terminals in common, said second and fourth transconductance amplifiers of the second section having a differential pair of third and fourth output terminals in common. In order to provide an oscillator capable of generating sinusoidal signals and tuneable at lower tuning frequencies and operating at lower supply voltages than the above conventional oscillator circuit, said first and second parallel RC filters are coupled between the first and second output terminals and the third and fourth output terminals, respectively, said first to fourth output terminals being respectively coupled to first to fourth DC current paths shunting at least a substantial part of said tuning and gain control currents to a supply voltage.