Phase distortionless limiter专利检索-施密特触发器电子零件及设备专利检索查询-专利查询网

Phase distortionless limiter

阅读：742发布：2022-02-04

专利汇可以提供Phase distortionless limiter专利检索，专利查询，专利分析的服务。并且An FM limiter in which the FM signal is applied to a Schmitt trigger through a sample gate. The sampling time of the gate is controlled by a stable pulse generator. The output of the Schmitt trigger is sampled by a second gate and these samples are applied to a bistable multivibrator. The second gate is controlled by a delayed output from the stable pulse generator. The output of the bistable multivibrator is a frequency modulated square wave which is phase locked to the input FM wave form.，下面是Phase distortionless limiter专利的具体信息内容。

权利要求

1. A phase distortionless limiter comprising, a. input means adapted to receive an FM signal; b. first sampling means connected to said input means for passing samples of said FM signal to an output thereof at a sampling rate equal to or greater than twice the frequency of the upper frequency to said FM signal, c. first bilevel signal means responsive to said samples for providing a first bilevel output signal which changes levels in response to a change in polarity of said samples applied thereto, provided said samples are greater in magnitude than a threshold value, d. second sampling means connected to said first bilevel signal means for passing samples of said first bilevel signal to an output thereof at the same sample rate of said first sampling means but delayed therefrom a period of time less than the time between samples but great enough to ensure that said first bilevel signal is not sampled during the switchover time from one level to the other level, and e. second bilevel signal means responsive to the samples from said second sampling means for providing a second bilevel output signal which changes levels in response to a change in polarity of said samples applied thereto.

2. A phase distortionless limiter as claimed in claim 1 wherein said first bilevel signal means is a Schmitt trigger and said second bilevel signal means is a bistable multivibrator.

3. A phase distortionless limiter as claimed in claim 2 wherein said first sampling means comprises a first sampling gate adapted to receive said FM signal and sampling pulses, said second sampling gate adapted to receive said first bilevel signal and sampling pulses, and further comprising a sampling pulse generator and a time delay means, the output of said sampling pulse generator being connected directly to said first sampling gate and through said time delay means to said second sampling gate.

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