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    • 8. 发明授权
    • Inverting logic buffer BICMOS switching circuit using an enabling switch
for three-state operation with reduced dissipation
    • 反相逻辑缓冲器BICMOS开关电路使用启用开关进行三态操作,减少耗散
    • US4678943A
    • 1987-07-07
    • US704209
    • 1985-02-22
    • Akira UragamiYukio SuzukiShinji KadonoMasahiro IwamuraIkuro MasudaTatsumi Yamauchi
    • Akira UragamiYukio SuzukiShinji KadonoMasahiro IwamuraIkuro MasudaTatsumi Yamauchi
    • H03K19/0175H03K17/04H03K17/60H03K19/0944
    • H03K19/09448
    • A switching circuit comprises a pre-stage circuit coupled to receive an input signal and an output stage, wherein an output signal having a phase opposite to that of a signal of an input terminal IN can be obtained from an output terminal OUT of the output stage. The pre-stage circuit includes a p-channel MOSFET M1 and an n-channel MOSFET M2 that receive input signals at their gates. The output stage includes two NPN transistors Q1 and Q2 that are connected in series. The drain output of the p-channel MOSFET M1 is applied to the base of one of the transistors of the output stage, and the source output of the n-channel MOSFET M2 is applied to the base of the other of the transistors of the output stage. A third MOSFET M3 is coupled between a power supply and the p-channel MOSFET M1 and the n-channel MOSFET M2. When the MOSFET M3 is rendered non-conductive by a control signal EN, both MOSFETs M1 and M2 and both NPN transistors Q1 and Q2 become non-conductive irrespective of the signal of the input terminal IN. Under this condition, the output terminal OUT is in a floating state. Thus, the switching circuit is a tri-state circuit.
    • 开关电路包括耦合以接收输入信号的预级电路和输出级,其中可以从输出级的输出端OUT获得具有与输入端IN的信号相反的相位的输出信号 。 该前级电路包括在其栅极接收输入信号的p沟道MOSFET M1和n沟道MOSFET M2。 输出级包括串联连接的两个NPN晶体管Q1和Q2。 p沟道MOSFET M1的漏极输出被施加到输出级的一个晶体管的基极,并且n沟道MOSFET M2的源极输出被施加到输出的晶体管的另一个的基极 阶段。 第三个MOSFET M3耦合在电源和p沟道MOSFET M1和n沟道MOSFET M2之间。 当通过控制信号EN使MOSFET M3不导通时,无论输入端子IN的信号如何,MOSFET M1和M2以及两个NPN晶体管Q1和Q2都不导通。 在这种情况下,输出端子OUT处于浮置状态。 因此,开关电路是三态电路。
    • 9. 发明授权
    • High speed bi-comos switching circuit
    • 高速双电源开关电路
    • US4694203A
    • 1987-09-15
    • US716151
    • 1985-03-26
    • Akira UragamiYukio SuzukiMasahiro IwamuraIkuro Masuda
    • Akira UragamiYukio SuzukiMasahiro IwamuraIkuro Masuda
    • H03K19/08H03K17/04H03K17/0412H03K17/567H03K17/60H03K17/687H03K19/017H03K19/0944H03K19/013
    • H03K17/04126H03K17/567H03K19/09448
    • A bipolar/CMOS mixed type switching circuit comprising two npn-type bipolar transistors Q.sub.1, Q.sub.2 that are connected in the form of a totem pole in the output stage, a CMOS inverter and an NMOSFET M.sub.3 for driving these transistors in a complementary manner, and resistance means R for discharging the electric charge stored in the base of the transistor Q.sub.2. The threshold voltage of an NMOSFET M.sub.2 constituting the CMOS inverter in the absence of substrate effect is set to be substantially equal to the threshold voltage of the NMOSFET M.sub.3 in the absence of the substrate effect, and the channel conductance W.sub.N /L.sub.N of the NMOSFET M.sub.3 is so set that the threshold voltage V.sub.LT1 of the CMOS inverter and the practical threshold voltage V.sub.LT2 of the NMOSFET M.sub.3 will be nearly the same. Owing to the above structure, there is obtained a switching circuit which permits little through current to flow and which operates at high speeds.
    • 一种双极/ CMOS混合型开关电路,包括在输出级以图腾柱形式连接的两个npn型双极晶体管Q1,Q2,CMOS反相器和用于以互补方式驱动这些晶体管的NMOSFET M3;以及 用于对存储在晶体管Q2的基极中的电荷进行放电的电阻装置R. 在不存在衬底效应的情况下,构成CMOS反相器的NMOSFET M2的阈值电压被设置为在没有衬底效应的情况下基本上等于NMOSFET M3的阈值电压,并且NMOSFET M3的沟道电导WN / LN 被设置为使得CMOS反相器的阈值电压VLT1和NMOSFET M3的实际阈值电压VLT2将几乎相同。 由于上述结构,所以获得了允许很少的直流电流并且高速运行的开关电路。