公开(公告)号：US5559459A

公开(公告)日：1996-09-24

申请号：US366414

申请日：1994-12-29

申请人： Paul R. Back ,  Paul R. Carlin ,  Joseph M. Lamb

发明人： Paul R. Back ,  Paul R. Carlin ,  Joseph M. Lamb

IPC分类号： G06F1/04 ,  G06F11/00 ,  G06F11/18 ,  H03K19/00

CPC分类号： G06F11/1604 ,  G06F1/04 ,  G06F11/18

摘要： A clock signal generation arrangement for generating clocking signals for use in a fault-tolerant computer system generates a timing signal in response to a common clock signal. The clock signal generation arrangement comprises a system clock signal generator and a clock signal recovery circuit interconnected by a plurality of clock signal transfer lines. The system clock signal generator generates, in response to a common clock signal, a plurality of system clock signals preferably of uniform frequency and phase for transmission over a like plurality of clock signal transfer lines. The clock signal recovery circuit receives the system clock signals from the clock signal transfer lines and generates a unitary timing signal. The clock signal recovery circuit includes a voting circuit, a latch circuit and a latch control circuit. The voting circuit generates a voted clock signal having signal transitions that are generally aligned with transitions of a majority of the system clock signals. The latch circuit has alternating set and reset conditions in response to transitions of the voted clock signal, and generates the timing signal to have transitions corresponding to the latch circuit's respective set and reset conditions. Finally, the latch control circuit inhibits the latch circuit from transitioning between its set and reset conditions for a selected time period after a previous transition therebetween, so that the latch circuit will be insensitive to noise in the voted clock signal following such a transition.

摘要翻译： 用于产生在容错计算机系统中使用的时钟信号的时钟信号产生装置响应于公共时钟信号产生定时信号。 时钟信号产生装置包括由多个时钟信号传输线互连的系统时钟信号发生器和时钟信号恢复电路。 系统时钟信号发生器响应于公共时钟信号产生多个系统时钟信号，优选地具有均匀的频率和相位，以在相同的多个时钟信号传输线上传输。 时钟信号恢复电路从时钟信号传输线接收系统时钟信号，并产生一个统一的定时信号。 时钟信号恢复电路包括一个投票电路，一个锁存电路和一个锁存控制电路。 投票电路产生具有通常与大多数系统时钟信号的转变对准的信号转换的投票时钟信号。 锁存电路响应于投票时钟信号的转变而具有交替的置位和复位条件，并且产生定时信号以使其对应于锁存电路的相应设置和复位条件。 最后，锁存控制电路在其之间的转换之后的选定时间段内禁止锁存电路在其设定和复位条件之间转换，使得锁存电路对这种转换后的投票时钟信号中的噪声不敏感。

公开(公告)号：US5111086A

公开(公告)日：1992-05-05

申请号：US615729

申请日：1990-11-19

申请人： Paul R. Back

发明人： Paul R. Back

IPC分类号： H03K5/00 ,  H03K5/13 ,  H03K19/003

CPC分类号： H03K19/00323 ,  H03K5/133 ,  H03K2005/00097

摘要： Gate speed evaluation circuitry evaluates the operating speed of gates of a calibration network and adjusts the length of a tapped delay network on the same chip to provide uniform delay in a signal.

摘要翻译： 门速评估电路评估校准网络的门的工作速度，并调整同一芯片上的抽头延迟网络的长度，以提供信号的均匀延迟。

公开(公告)号：US4112350A

公开(公告)日：1978-09-05

申请号：US833633

申请日：1977-09-15

申请人： Thomas G. Van Vessem ,  Paul R. Back

发明人： Thomas G. Van Vessem ,  Paul R. Back

IPC分类号： F02P17/10 ,  F02P17/00

CPC分类号： F02P17/10

摘要： The signal indicative of switching of the ignition primary coil of a spark ignition engine is conditioned by means of compatible, combined, multiple and variable threshold testing of both the high end and the low end of the coil primary, without need to know (or alter operation in dependence upon) whether the engine employs positive switching at the high end of the primary coil or negative switching at the low end of the primary coil. To sense the end of the dwell period, the high coil voltage is compared against a negative voltage which will never occur if low coil switching is employed, but which will occur at the start of firing time in a positive switching system. Similarly, low coil is compared against a positive voltage which would never occur in a positively switched system, but which does occur at the start of firing time if negative switching is used. The circuits recognizing the start of dwell time require both that high coil be in excess of some low voltage and that low coil be less than some fraction of battery voltage; when positive switching is used, low coil is always at or near ground and therefore always meets the test; when negative switching is used, high coil is always at battery and therefore always meets the test.

摘要翻译： 指示火花点火发动机的点火初级线圈的切换的信号通过线圈主机的高端和低端的兼容的，组合的，多个和可变的阈值测试来调节，而不需要知道（或改变） 根据发动机是否在初级线圈的高端采用正切换或在初级线圈的低端采用负切换。 为了感测停留时间的结束，将高线圈电压与负电压进行比较，如果采用低线圈切换，则将不会发生负电压，但是在正切换系统中将在开始时发生。 类似地，将低线圈与正电压系统中绝对不会发生的正电压进行比较，但是如果使用负极开关，则在启动时开始发生。 识别停留时间开始的电路需要高线圈超过一些低电压，并且低线圈小于电池电压的一部分; 当使用正切换时，低线圈总是处于或接近地线，因此始终满足测试; 当使用负开关时，高线圈始终处于电池状态，因此始终满足测试。

公开(公告)号：US4165481A

公开(公告)日：1979-08-21

申请号：US833631

申请日：1977-09-15

申请人： John C. Wells ,  Paul R. Back

发明人： John C. Wells ,  Paul R. Back

IPC分类号： F02D17/00 ,  F02P9/00 ,  F02P17/02 ,  F02P17/10 ,  G01R31/00 ,  G01M15/00

CPC分类号： G01R31/006 ,  F02D17/00 ,  F02P17/02 ,  F02P17/10 ,  F02P9/002

摘要： The voltage across the primary of the ignition coil of a spark ignition engine is limited so as to defeat ignition, while at the same time allowing measurement of ignition-related signals, by means of unilateral impedance means which are selectively connected by a switch in parallel with the ignition coil primary, to service engines both with and without series impedance in the low coil signal line. To avoid reversed-polarity connection, the switch is operable only if the average voltage between high coil and low coil connections indicate correct polarity. Sensing of high coil and low coil signals indicative of firing time and dwell is achieved by monitoring current flow through the unilateral ignition defeat impedance, by means of an optical isolator resistively coupled across the unilateral impedance; current in the optical isolator is limited by means of a shunt transistor, and the optical isolator is protected against high voltages by an additional unilateral impedance. The ignition defeat and current-responsive sensing of the end of the dwell period is utilized with other signal conditioning circuitry to provide signals delineating firing time and dwell.

摘要翻译： 火花点火发动机的点火线圈的初级侧的电压受到限制，以防止点火，同时允许通过单向阻抗装置测量点火相关信号，该单向阻抗装置由并联的开关选择性连接 点火线圈主要用于为低线圈信号线中的带和不带串联阻抗的发动机提供服务。 为了避免反极性连接，只有当高线圈和低线圈连接之间的平均电压表示正确的极性时，开关才可操作。 通过在单向阻抗上电阻耦合的光隔离器监测通过单侧点火失败阻抗的电流流动来实现表示点火时间和停留的高线圈和低线圈信号的感测; 光隔离器中的电流受到并联晶体管的限制，光隔离器被额外的单边阻抗保护而免受高电压的影响。 停止时间段结束时的点火失败和电流响应感测与其他信号调节电路一起使用，以提供描绘点火时间和停留的信号。

公开(公告)号：US4112351A

公开(公告)日：1978-09-05

申请号：US829857

申请日：1977-09-01

申请人： Paul R. Back ,  Thomas G. Van Vessem

发明人： Paul R. Back ,  Thomas G. Van Vessem

IPC分类号： F02P17/10 ,  F02P17/00

CPC分类号： F02P17/10

摘要： The end of the dwell period of a spark ignition engine is recognized by a high voltage, spark-creating swing in the low coil signal determined from comparison with a first, fixed threshold voltage which is above the current limited voltage variation of modern electronic high voltage ignition systems and a low peak primary voltage normally achieved with ignition defeat used in other diagnostic procedures. The beginning of the dwell period is sensed by comparing the low coil signal to the actual battery voltage of the engine under test; the comparison is against a substantial fraction of battery voltage which will always exceed any low coil voltage which could exist during the dwell period. False sensing of the beginning of dwell during the spark ringing time is avoided by delay circuitry which senses only those low voltage swings which exist for longer than a period of time greater than the duration of any of the low voltage excursions of the low coil ringing voltage; this delay may be subtracted with logic or by digital numeric subtraction, thereby to provide a reliable, square, conditioned low coil manifestation of vehicle low coil signals for vehicles with modern electronic high voltage ignitions as well as vehicles using the older, traditional breaker point ignition system, at high speed or slow crank, with good or bad battery and/or alternator.

摘要翻译： 火花点火发动机的停留时间段的结束由与高于现有电子高压的电流限制电压变化的第一固定阈值电压确定的低线圈信号中的高电压，产生火花的摆动来识别 点火系统和通常在其他诊断程序中用于点火失败的低峰值初级电压。 通过将低线圈信号与被测发动机的实际电池电压进行比较来检测停留时间的开始; 该比较是相当于电池电压的大部分，其总是会超过在停留期间可能存在的任何低线圈电压。 通过延迟电路避免在火花振铃时间期间停止开始的虚假感测，该延迟电路仅检测存在时间长于低于低线圈振铃电压的任何低电压偏移的持续时间的那些低电压摆动 ; 该延迟可以用逻辑或数字数字减法来减去，从而为具有现代电子高压点火的车辆以及使用较旧的传统断路器点火点的车辆提供车辆低线圈信号的可靠的，平方的条件化的低线圈表现 系统，高速或慢速曲柄，电池和/或交流发电机有好坏。