Pulse train filter circuit particularly for automotive tachogenerators
阅读：436发布：2023-02-02
专利汇可以提供Pulse train filter circuit particularly for automotive tachogenerators专利检索，专利查询，专利分析的服务。并且A voltage controlled oscillator is kept in step with an incoming train of pulses by a phase-locked loop containing a pulse comparator operating as an EXCLUSIVE OR gate followed by a regulating amplifier that partially integrates while also transmitting the signal to the frequency control of the oscillator. Effective phase-locked operation of the oscillator over a wider frequency range or for more rapid frequency changes is provided by an auxiliary control circuit fed by the same input pulses, which integrates the input with a slight delay and acts as a low-pass circuit passing frequencies within the full range of the input pulse repetition frequencies. The phase-locked loop control and the auxiliary control are combined for control of the oscillator frequency either in a simple summing circuit or through a limiter, which gives control to the auxiliary circuit when the frequency changes sharply. The circuit is particularly useful for filtering out irregularities from the signal of a tachogenerator that corresponds to the velocity of a wheel of a motor vehicle, and in this application the circuit can be arranged to yield an acceleration signal as well as a filtered velocity signal.，下面是Pulse train filter circuit particularly for automotive tachogenerators专利的具体信息内容。
1. A pulse train filter circuit for a pulse train of varying frequency comprising: a phase comparison circuit (10) having a first input for receiving an input pulse train and a second input (102) for receiving an output pulse train; a pulse train generating oscillator (12) of voltage controlled frequency for supplying an output pulse train to an output circuit and to said second input (102) of said comparison circuit (10); a regulating circuit (11) having its input connected to the output of said comparison circuit (10) and its output connected for frequency control of said oscillator (12), for converting the output of said comparison circuit (10) to a control voltage of suitable characteristics and magnitude range for causing the output pulses of said oscillator (12) to keep in step with pulses of said input pulse train, and an auxiliary control circuit for increasing the capture range of the frequency control of said oscillator, containing a low-pass circuit (18) to which is supplied the same input frequency (f1) as said comparison circuit (10), said auxiliary control circuit (18) continuously furnishing a control voltage of constant polarity to which the frequency control of said output (12) is responsive in addition to being responsive to the output of said regulating circuit (11).
1. A pulse train filter circuit for a pulse train of varying frequency comprising: a phase comparison circuit (10) having a first input for receiving an input pulse train and a second input (102) for receiving an output pulse train; a pulse train generating oscillator (12) of voltage controlled frequency for supplying an output pulse train to an output circuit and to said second input (102) of said comparison circuit (10); a regulating circuit (11) having its input connected to the output of said comparison circuit (10) and its output connected for frequency control of said oscillator (12), for converting the output of said comparison circuit (10) to a control voltage of suitable characteristics and magnitude range for causing the output pulses of said oscillator (12) to keep in step with pulses of said input pulse train, and an auxiliary control circuit for increasing the capture range of the frequency control of said oscillator, containing a low-pass circuit (18) to which is supplied the same input frequency (f1) as said comparison circuit (10), said auxiliary control circuit (18) continuously furnishing a control voltage of constant polarity to which the frequency control of said output (12) is responsive in addition to being responsive to the output of said regulating circuit (11).
2. A pulse train filter circuit as defined in claim 1, in which said phase comparison circuit (10) has the characteristics of an EXCLUSIVE OR gate.
3. A pulse train filter circuit as defined in claim 1, in which a frequency division circuit (16) is interposed between the output of said oscillator (12) and said second input (102) of said comparison circuit (10).
4. A pulse train filter circuit as defined in claim 1, in which the frequency control of said oscillator is connected to the output of a summing circuit (17), the two inputs of which are connected respectively to said low-pass circuit (18) and to said regulating circuit (11).
5. A pulse train circuit as defined in claim 4, in which an amplitude control means (117) is interposed between at least one of the inputs of said summing circuit (17) and the preceding circuit (11 or 18) that supplies a voltage signal to such input of said summing circuit (17).
6. A pulse train filter circuit as defined in claim 1, in which a limiting circuit (30) is interposed between the output of said low-pass circuit (18) and the frequency control of said oscillator (12) for limiting the extend to which the frequency control voltage of said oscillator may be caused by said regulating circuit (11) to deviate from the output voltage of said low-pass circuit (18).
7. A pulse train filter circuit as defined in claim 6, in which said limiting circuit (30) contains at least two diodes (301, 303) in antiparallel connection.
8. A pulse train filter circuit as defined in claim 7, in which said limiting circuit (30) comprises two series chains each of a plurality of diodes (301, 302, 303, 304), said chains being combined in antiparallel connection.
9. A pulse train filter circuit as defined in claim 1, in which a limiting circuit is interposed between the output of said low-pass circuit (18) and the frequency control of said oscillator (12) for limiting the extent to which the frequency control voltage of said oscillator may be caused by said regulating circuit (11) to deviate from the output voltage of said low-pass circuit (18), said limiting circuit comprising two parallel-connected semiconductor switching devices (310, 311), the respective control electrodes of said semiconductor switching devices (310, 311) being each connected with a voltage sensitive threshold switch (311, 232).
10. A pulse train filter circuit as defined in claim 9, in which said semiconductor switching devices (310, 311) are field effect transistors.
11. A pulse train filter circuit as defined in claim 9, in which both of said voltage sensitive threshold switches (313, 323) comprise operational amplifiers having differential inputs, each of said operational amplifiers having one input connected with the output of said regulating circuit (11) and another input connected with the output of said low-pass circuit (18).
12. A pulse train filter circuit as defined in claim 11, in which an amplitude adjusting means (316) is interposed between at least one of the inputs of said operational amplifiers (313, 323) and the output of the stage (18, 11) supplying an electrical signal thereto.
13. A pulse train filter circuit as defined in claim 1, in which said regulating circuit (11) comprises an operational amplifier (110) arranged to provide regulation in a combined proportional-integral mode by virtue of a resistor (111) and a capacitor (112) connected in series to provide a negative feedback path for said operational amplifier (110).
14. A pulse train filter circuit as defined in claim 13, in which means are provided for applying a constant correction voltage to said operational amplifier (110) of said regulating circuit (11) for setting a constant phase difference in the phase regulation applied to said oscillator (12) by said phase comparison circuit (10) and said regulating circuit (11).
15. A pulse train filter circuit as defined in claim 1, in which said regulating circuit (11) is provided in a form having a combined proportional and integral regulating characteristic.
16. A pulse train filter circuit as defined in claim 1, in which said regulating circuit (11) is constituted by a proportional regulator (33) and an integrating regulator (34) operating in series.
17. A pulse train filter circuit as defined in claim 16, in which means are provided including a smoothing circuit (28) with its input connected to the output of said proportional regulating circuit (33) for generating a direct current voltage signal that is proportional to the first derivative with respect to time of the input frequency (f1).
| 标题 | 发布/更新时间 | 阅读量 |
|---|---|---|
| 一种高灵敏气体检测装置及方法 | 2020-05-11 | 865 |
| 一种同频周期信号相位差的测试系统及方法 | 2020-05-12 | 328 |
| 基于时分复用的机载防撞系统接收通道融合系统 | 2020-05-08 | 462 |
| 一种蓝宝石微波频率源和控制方法 | 2020-05-11 | 18 |
| 基于非线性有源天线的相控阵前端 | 2020-05-12 | 340 |
| 三级式同步电机转子位置估计系统及估计方法 | 2020-05-12 | 788 |
| 一种具有快锁功能的宽带低相噪锁相环 | 2020-05-11 | 285 |
| 结合比率运算的数字锁相放大器 | 2020-05-12 | 877 |
| 一种功率开关器件非线性修正装置 | 2020-05-11 | 893 |
| 一种安检信号收发组件 | 2020-05-08 | 800 |
高效检索全球专利专利汇是专利免费检索,专利查询,专利分析-国家发明专利查询检索分析平台，是提供专利分析，专利查询，专利检索等数据服务功能的知识产权数据服务商。
我们的产品包含105个国家的1.26亿组数据，免费查、免费专利分析。
分析报告
专利汇分析报告产品可以对行业情报数据进行梳理分析，涉及维度包括行业专利基本状况分析、地域分析、技术分析、发明人分析、申请人分析、专利权人分析、失效分析、核心专利分析、法律分析、研发重点分析、企业专利处境分析、技术处境分析、专利寿命分析、企业定位分析、引证分析等超过60个分析角度，系统通过AI智能系统对图表进行解读，只需1分钟，一键生成行业专利分析报告。
QQ群二维码
意见反馈
意见反馈