Frequency-sensitive triggering techniques专利检索-定时信号发生器电子零件及设备专利检索查询-专利查询网

Frequency-sensitive triggering techniques

阅读：825发布：2022-03-31

专利汇可以提供Frequency-sensitive triggering techniques专利检索，专利查询，专利分析的服务。并且A reliable trigger signal may be produced from a periodic electrical signal having several voltage peaks in each cycle by providing a controlled rectifier that is switched to its conductive state by the receipt of one of the voltage peaks. The switching of the controlled rectifier energizes a signal generator that returns the controlled rectifier to its nonconductive state only after the occurrence of all voltage peaks in each cycle. As a result, only one trigger signal is produced in each cycle. The signal generator is controlled by a timing circuit that is charged to a progressively higher voltage as the cyclical repetition rate of the periodic electrical signal increases, thereby decreasing the time in each cycle in which the controlled rectifier conducts.，下面是Frequency-sensitive triggering techniques专利的具体信息内容。

权利要求

1. Apparatus for producing a trigger signal in response to a periodic electrical signal that may have more than one voltage peak in each cycle, said apparatus comprising: input means for receiving said periodic electrical signal; gate means operatively connected to said input means, said gate means having a conductive state and a nonconductive state; circuit means for conducting said periodic electrical signal to said gate means so that said gate means is switched to one of its states in response to a first voltage peak in said periodic electrical signal whereby a trigger signal is produced; first means for conducting said trigger signal to an output terminal; a signal generator for producing a switching signal within a predetermined time period after the production of said trigger signal; second means connected to said gate means for reswitching said gate means to its other said state in response to said switching signal; and timing means connected between said signal generator and said gate means for automatically substantially decreasing the duration of said time period as the cyclical repetition rate of said periodic electrical signal increases.

2. Apparatus, as claimed in claim 1, wherein said circuit means comprises: a switch connected to the inpUt means; inverter means connected between said switch and said gate means for inverting the phase of said periodic electrical signal; and means connected between said switch and said inverter means for applying said periodic electrical signal to said inverter means without phase inversion.

3. Apparatus, as claimed in claim 1, wherein said first means comprises a capacitor and a diode connected in series between said output terminal and said gate means.

4. Apparatus, as claimed in claim 1, wherein said timing means comprises a capacitive-resistive circuit that is periodically charged by the conduction of said gate means so that the average voltage charged across said capacitve-resistive circuit increases as the cyclical repetition rate of the periodic electrical signal increases.

5. Apparatus, as claimed in claim 4, wherein said timing means further comprises manually operated adjustment means for initially adjusting the duration of said time period.

6. Apparatus, as claimed in claim 1, wherein said timing means comprises at least two capacitors connected in parallel between said gate means and said signal generator and a resistor connected between said two capacitors.

7. Apparatus, as claimed in claim 6, wherein said timing means further comprises a diode connected between said gate means and said capacitors.

8. Apparatus, as claimed in claim 2, wherein said invertor means comprises an emitter and a base and where said means connected between said switch and said inverter means comprises a first circuit means for conducting a signal from said switch to said base and a second circuit means for conducting a signal from said switch to said emitter.

9. A method of triggering an oscilloscope that displays a periodic electrical signal having more than one voltage peak in each cycle thereof by means of a gating device having a conductive state and a nonconductive state, said method comprising the steps of: switching the gating device to one of its states in response to a first voltage peak in each cycle of the periodic electrical signal so that a trigger signal is produced; conducting the trigger signal to the oscilloscope; holding the gating device in said state so that subsequent voltage peaks in said cycle have no effect thereon; reswitching the gating device to its other said state with in a predetermined time period after the production of said trigger signal; and substantially decreasing said time period as the cyclical repetition rate of said periodic electrical signal increases.

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Frequency-sensitive triggering techniques

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