Frequency shift transmitter专利检索-正弦波滤波器变压器和转换设备专利检索查询-专利查询网

Frequency shift transmitter

阅读：987发布：2023-05-16

专利汇可以提供Frequency shift transmitter专利检索，专利查询，专利分析的服务。并且A frequency shift keying oscillator comprising filter circuits and a positive feedback circuit. First resistors and reactance elements in each filter determine the natural frequency of the oscillator. Keying signals selectively switch second resistors in parallel with the first resistors to change the natural frequency. The percentage resistance variations produced by the keying signals are substantially equal. This equalizes the steady-state gains of the oscillator in its two modes so that no amplitude discontinuities occur in the output signal as the oscillator switches from one mode to the other. As the reactor in each filter is a constant value element, no phase discontinuities occur. Hence, the output signal is a continuous, fundamental sinusoidal signal which has two mutually exclusive frequencies.，下面是Frequency shift transmitter专利的具体信息内容。

权利要求

1. An oscillator for mutually exclusively generating two frequency output signals in response to control signals, said oscillator comprising: A. a first operational amplifier, B. an active low-pass filter comprising a first resistance means and first capacitor in parallel connected between the output and inverting input of said amplifier, said first resistance means having first and second values, C. a high-pass filter comprising a second capacitor and a second resistance means in series with the inverting input of said first amplifier, D. a feedback circuit including a second operational amplifier for inverting signals from the output of said first amplifier and applying the feedback signals to said high-pass filter, said feedback circuit additionally including means for limiting the feedback signal to a value within the linear operating regions of said operational amplifiers, and E. means for switching said first and second resistance means between the first and second values simultaneously in response to control signals to thereby vary the oscillator output frequency without producing significant transients.

2. An oscillator circuit as recited in claim 1 wherein said first and second resistance means each comprise a first resistor and, in parallel therewith, switching means and a second resistor in series, said first and second resistor being paralleled in response to first control signals to thereby increase the natural frequency of said oscillator.

3. An oscillator for mutually exclusively generating first and second frequency signals in response to keying signals, said oscillator comprising: A. a first operational amplifier, B. a low-pass filter including a first inductor and a first resistance means in series with said first operational amplifier, said first resistance means having first and second values, C. a high-pass filter including a second inductor and a second resistance means in parallel and connected betwEen the output and inverting input of said first amplifiers, said second resistance means having first and second values, D. a feedback circuit including a second operational amplifier for inverting signals from the output of said first amplifier and applying the feedback signals to said low-pass filter, said feedback circuit additionally including means for limiting the feedback signal to a value within the linear operating regions of said operational amplifiers, and E. means responsive to the control signals for simultaneously switching said first and second resistance means between their first and second values simultaneously in response to control signals to thereby vary the oscillator output frequency.

4. An oscillator as recited in claim 3 wherein each of said first and second resistance means comprises a first resistor and, in parallel therewith, switching means and a second resistor in series, said first and second resistors being paralleled in response to first control signals to thereby increase the natural frequency of said oscillator.

说明书全文

相关专利内容

标题	发布/更新时间	阅读量
变凸极特性的三级电励磁式无刷同步电机转子位置估算方法	2020-09-14	4
一种输入输出多通道信号调理器	2020-10-10	4
一种测量冗余棒位检测装置	2020-12-10	4
专用于医用运动平板校准的信号发生器	2020-11-19	3
一种有源电力滤波器的控制器及其控制方法	2021-07-22	4
一种智能除草设备及其使用方法	2021-01-13	3
一种电阻电容精密测量电路	2020-06-03	2
System for measuring group delay in signal transmission	2023-04-02	2
Encoder	2022-09-12	2
用于具有阈值扩展的FM调制的设备	2020-11-23	2

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。

申请试用

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。

申请试用

正弦波滤波器热门专利

热门分类

Frequency shift transmitter

该功能需要专业版企业版VIP权限，您可以：