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1. 发明授权

US5122684A Current-injection logic (I.sup.2 L) driver for increasing fan-out 失效
标题翻译：电流注入逻辑（I2L）驱动器用于增加扇出
公开(公告)号：US5122684A
公开(公告)日：1992-06-16
申请号：US663539
申请日：1991-03-04
申请人： Tony Takeshian
发明人： Tony Takeshian
IPC分类号： H03K19/091
CPC分类号： H03K19/091
摘要： A current-injection logic synchronous driver circuit is responsive to an input signal for providing a plurality of output signals from a plurality of logic gates. The logic gates are connected in parallel with their inputs sharing a common node. A current supply provides a predetermined current to a first one of the plurality of logic gates, while a driver circuit operating in response to the input signal provides drive levels to the common node at the inputs of the logic gates sufficient for each logic gate to sink the equivalent of the predetermined current from the current supply. Thus, the synchronous drive circuit provides a plurality of output signals having the same logic state as the input signal while increasing the fan-out to other logic circuits of the system. The propagation delay through the synchronous driver is small because of the parallel connection of the logic gates with common drive thereto.
摘要翻译：电流注入逻辑同步驱动器电路响应于输入信号以从多个逻辑门提供多个输出信号。逻辑门与其共享公共节点的输入并行连接。电流源向多个逻辑门中的第一逻辑门提供预定电流，而响应于输入信号而工作的驱动电路在逻辑门的输入处向公共节点提供驱动电平，足以使每个逻辑门吸收相当于来自当前电源的预定电流。因此，同步驱动电路提供与输入信号具有相同逻辑状态的多个输出信号，同时增加扇出到系统的其它逻辑电路。由于与其共同驱动的逻辑门的并联连接，通过同步驱动器的传播延迟很小。

2. 发明授权

US5329585A Subscriber line interface circuit for controlling AC and DC output impedance 失效
标题翻译：用户线接口电路，用于控制交流和直流输出阻抗
公开(公告)号：US5329585A
公开(公告)日：1994-07-12
申请号：US983197
申请日：1992-11-30
申请人： David M. Susak , Tony Takeshian , Dennis L. Welty
发明人： David M. Susak , Tony Takeshian , Dennis L. Welty
IPC分类号： H04M19/00 , H04M1/76 , H04M7/04
CPC分类号： H04M19/005
摘要： A subscriber line interface circuit (SLIC) sets AC and DC output impedances as seen by first and second transmission signals. The common mode variation and differential variation of the first and second transmission signals is AC-sensed to provide a common mode feedback signal and a differential feedback signal which in turn controls the AC output impedance. The DC component of the first and second transmission signals is blocked allowing downstream amplifiers to operate at reduced power supply potentials. The DC variation of the first and second transmission signals is also sensed for providing a DC feedback signal to control the DC output impedance.
摘要翻译：用户线接口电路（SLIC）设置由第一和第二传输信号所见的AC和DC输出阻抗。对第一和第二传输信号的共模变化和差分变化进行AC感测，以提供共模反馈信号和差分反馈信号，该反馈信号又控制AC输出阻抗。第一和第二传输信号的DC分量被阻塞，允许下游放大器以降低的电源电位工作。还检测第一和第二传输信号的DC变化，以提供DC反馈信号来控制DC输出阻抗。

3. 发明授权

US5093585A Current biasing for I.sup.2 L circuits 失效
标题翻译： I2L电路的电流偏置
公开(公告)号：US5093585A
公开(公告)日：1992-03-03
申请号：US674477
申请日：1991-03-25
申请人： Geoffrey W. Perkins , Don W. Zobel , Tony Takeshian
发明人： Geoffrey W. Perkins , Don W. Zobel , Tony Takeshian
IPC分类号： G05F1/46 , H03K19/091
CPC分类号： H03K19/091 , G05F1/462
摘要： A negative feedback loop, including a two collector I.sup.2 L gate having one collector returned to the input of the gate and forcing a reference current into the other of the two collectors of the gate, is used to match the current at the collector of the injector of the gate to the reference current. The feedback loop further includes a current source for sourcing the reference current and a pair of cascoded emitter follower transistors coupled between the current source and the injector input of the gate such that the feedback loop will regulate the current through the injector to be equal to the reference current. The injector input of the gate of the feedback loop can be coupled to the injector inputs of similar I.sup.2 L gates to be biased therefrom such that the injector currents are well controlled.
摘要翻译：负反馈环路包括两个集电极I2L栅极，其具有一个集电极返回到栅极的输入端，并且将参考电流强制进入栅极的两个集电极中的另一个，用于匹配在注入器的集电极处的电流门到参考电流。反馈环路还包括用于提供参考电流的电流源和耦合在电流源和栅极的注入器输入之间的一对级联发射极跟随器晶体管，使得反馈回路将调节通过喷射器的电流等于参考电流。反馈环路的栅极的注入器输入端可以耦合到类似的I2L栅极的注入器输入端，从而被偏置，使得注入器电流被良好地控制。

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