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1. 发明授权

US4899382A Telephone circuit using DC blocked transformer and negative impedance technique 失效
标题翻译：使用直流阻塞变压器和负阻抗技术的电话电路
公开(公告)号：US4899382A
公开(公告)日：1990-02-06
申请号：US207607
申请日：1988-06-15
申请人： Todd H. Gartner
发明人： Todd H. Gartner
IPC分类号： H04M19/00
CPC分类号： H04M19/001 , H04M19/005
摘要： The invention provides a combination in a SLIC for telecommunication applications of ac impedance synthesis, e.g. raising the impedance of battery feed resistances by feedback techniques; in combination with real battery feed resistors and a dc block transformer. A dc blocked transformer is coupled to line current feed resistors and a feedback loop network to synthesize the desired input impedance, such that the feedback network incorporates both positive and negative feedback. A loop stabilizing resistor is used in shunt with the dc blocked transformer secondary to reduce gain peaking and phase shift. The transformer is an integral part of the feedback loop, and one of the outputs of the solid state circuitry are directly connected to the subscriber line, thereby eliminating the problem of lightning induced transients, in that the output stages of the solid-state operational amplifier circuitry of the invention are transformer isolated from the subscriber line, and are coupled to the subscriber line through high impedances providing high resistance isolation.

2. 发明授权

US4128885A Digital circuitry for spark timing and exhaust gas recirculation control 失效
标题翻译：用于火花定时和废气再循环控制的数字电路
公开(公告)号：US4128885A
公开(公告)日：1978-12-05
申请号：US798067
申请日：1977-05-18
申请人： Robert J. Valek , Todd H. Gartner
发明人： Robert J. Valek , Todd H. Gartner
IPC分类号： F02D21/08 , F02D45/00 , F02M25/07 , F02P5/15 , F02P5/155 , F02M25/06 , F02D5/00
CPC分类号： F02D41/0077 , F02P5/15 , Y02T10/46 , Y02T10/47
摘要： A digital signal processing circuit for controlling the spark timing and exhaust gas recirculation (EGR) of an internal combustion engine is disclosed herein. The circuit first samples the magnitude of the vacuum manifold pressure and produces a complex function analog output signal in response thereto. The output signal is produced by first converting the vacuum pressure to a digital signal, then using a read only memory to produce a complex function digital output signal and then reconverting the digital output signal to an analog output signal. The pressure analog output signal is then stored in a first holding device. Subsequently, an analog signal proportional to the period of engine revolution is sampled by the same circuit. However, the circuit now develops a digital output signal which is a function of the inverse of this analog input signal and this inverse digital output signal is effectively multiplied by the held pressure analog signal to produce an EGR analog control voltage which is stored in a second holding device. Subsequently, an analog output signal which is a different inverse function of the engine period is developed and stored in the first holding device and then the EGR analog output signal is processed by the circuit and effectively multiplied by the analog signal now being held in the first holding device to produce a spark timing control analog output signal which is stored in a third holding device. The EGR control signal in the second holding device controls how much exhaust gas will be reinjected into the cylinders of the internal combustion engine and the spark timing control signal in the second holding device adjusts the timing of the sparks generated for the cylinders of the internal combustion engine.
摘要翻译：本文公开了一种用于控制内燃机的火花正时和废气再循环（EGR）的数字信号处理电路。该电路首先对真空歧管压力的大小进行采样，并响应于此产生复数函数模拟输出信号。通过首先将真空压力转换为数字信号，然后使用只读存储器产生复数函数数字输出信号，然后将数字输出信号重新转换为模拟输出信号，产生输出信号。然后将压力模拟输出信号存储在第一保持装置中。随后，通过相同的电路对与发动机转数周期成比例的模拟信号进行采样。然而，该电路现在开发了一个数字输出信号，该数字输出信号是该模拟输入信号的倒数的函数，并且该反向数字输出信号被有效地乘以保持的压力模拟信号以产生一个EGR模拟控制电压，该模拟控制电压存储在第二个保持装置。随后，将与发动机周期不同的反向功能的模拟输出信号显影并存储在第一保持装置中，然后由模拟输出信号进行处理，并且有效地乘以现在被保持在第一保持装置中的模拟信号保持装置，以产生存储在第三保持装置中的火花定时控制模拟输出信号。第二保持装置中的EGR控制信号控制将多少废气重新注入到内燃机的气缸中，并且第二保持装置中的火花正时控制信号调节对内燃机气缸产生的火花的定时发动机。

3. 发明授权

US4429186A Floating battery feed circuit for telephone subscriber line interface 失效
标题翻译：用于电话用户线接口的浮动电池供电电路
公开(公告)号：US4429186A
公开(公告)日：1984-01-31
申请号：US429743
申请日：1982-09-30
申请人： Todd H. Gartner
发明人： Todd H. Gartner
IPC分类号： H04M19/00
CPC分类号： H04M19/008
摘要： An arrangement for providing a subscriber line with an operating potential. The energy to the line is transferred thereto inductively at a fixed frequency and includes the rectification means on the subscriber side of the inductor. The amount of energy transferred to the line is controlled by pulse width. The control pulse width circuit includes means to decrease the energy transfer above a level at which a subscriber station internal regulation would be defeated.
摘要翻译：一种为用户线提供操作电位的装置。线路的能量以固定的频率感应地传送，并且包括在电感器的用户侧的整流装置。传输到线路的能量的量由脉冲宽度控制。控制脉冲宽度电路包括将能量传递降低到用户站内部调节将被击败的水平以上的装置。

4. 发明授权

US4168682A Electronic ignition timing system using digital rate multiplication 失效
公开(公告)号：US4168682A
公开(公告)日：1979-09-25
申请号：US779974
申请日：1977-03-22
申请人： Todd H. Gartner , Robert J. Valek
发明人： Todd H. Gartner , Robert J. Valek
IPC分类号： F02P5/15 , F02P7/077 , G06F7/68 , F02P5/08 , F02P1/00
CPC分类号： G06F7/68 , F02P5/15 , F02P7/0775 , Y02T10/46
摘要： An electronic ignition timing system for an internal combustion engine which rotates a crankshaft is disclosed. The ignition system comprises a plurality of variable engine condition sensors which produce corresponding analog output signals and a crankshaft position sensor. A timing control logic circuit periodically multiplexes each of the variable engine condition sensors such that they are sequentially connected as inputs to an analog to digital (A/D) converter which produces an output signal comprising a pulse train for each of the multiplexed engine conditions. The total number of pulses in each pulse train is related to the magnitude of the variable engine condition currently being connected to the A/D converter. In addition, high resolution crankshaft position pulses are produced, preferably by an electronic angle divider which receives coarse crankshaft position pulses and produces high resolution crankshaft position pulses. The variable engine condition pulse trains and the high resolution crankshaft position pulses are then multiplexed to produce an input signal to a binary rate multiplier (BRM) which has its output connected to a counter. The input signal going to the BRM is monitored by a separate counter which controls the output of a read only memory (ROM) that determines the multiplication factor M of the BRM. The use of this separate counter to monitor the inputs of the BRM results in producing an output count from the BRM which is a non-linear function of the input signal, and this is accomplished with the use of a minimum number of memory cells in the ROM. A count related to the output count of the BRM for all of the multiplexed inputs is loaded into a phase counter which then proceeds to count down at a rate determined by the high resolution crankshaft position pulses. A latch circuit is then used to generate a spark timing signal when the count of the phase counter reaches a predetermined count. The spark timing pulses are produced at predetermined engine crankshaft positions related to the output count of the BRM wherein the output count is the summation of a plurality of non-linear output functions relating engine spark timing to the plurality of multiplexed variable engine conditions, including engine speed.

5. 发明授权

US4006319A Foreign potential checker 失效
标题翻译：外国检查员
公开(公告)号：US4006319A
公开(公告)日：1977-02-01
申请号：US651310
申请日：1976-01-22
申请人： Todd H. Gartner
发明人： Todd H. Gartner
IPC分类号： H04B3/46
CPC分类号： H04B3/46
摘要： The disclosure relates to a monitoring system and method for determining the magnitude of the equivalent voltage source impedance and the magnitude of the equivalent voltage source voltage on a telephone line and switching network of a telephone system. The monitoring system measures the Thevenin source voltage and source impedance to ground on the line by applying two independent voltage conditions to the line and senses the resulting steady state voltages thereby produced in a sensing resistor. The magnitudes of the sensed steady state voltage are thereafter utilized for obtaining the Thevenin source voltage and source impedance magnitudes.
摘要翻译：本公开涉及一种用于确定等效电压源阻抗的大小以及电话线路和电话系统的交换网络上的等效电压源电压的大小的监视系统和方法。监控系统通过对线路施加两个独立的电压条件来测量该线上的戴维宁源极电压和源极对地的阻抗，并感测由此产生的感测电阻器中产生的稳态电压。感测的稳态电压的大小随后用于获得戴维宁源电压和源阻抗幅值。

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