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1. 发明授权

US4100497A Selective rescan delay for multi-channel scanning radio receiver 失效
标题翻译：多频扫描无线电接收机的选择性重新扫描延时
公开(公告)号：US4100497A
公开(公告)日：1978-07-11
申请号：US741475
申请日：1976-11-12
申请人： George H. Fathauer , Cecil Ernest Mathis , Warren L. Williamson
发明人： George H. Fathauer , Cecil Ernest Mathis , Warren L. Williamson
IPC分类号： H03J7/18 , H04B1/32
CPC分类号： H03J7/18
摘要： A signal-seeking scanning radio receiver employing a selective rescan delay circuit for delaying automatic resumption of multi-channel scanning for a period of time following termination of a signal on a tuned channel in response to an auxiliary output signal from a memory programmed to provide auxiliary output signals only for certain preselected channels tuned to a predetermined frequency on which two-way communications are anticipated without delaying automatic scan resumption for channels on which only one-way communications are anticipated.
摘要翻译：一种信号寻求扫描无线电接收机，其采用选择性重新扫描延迟电路，用于响应于来自被编程为提供辅助的存储器的辅助输出信号，在调谐信道上的信号终止之后的一段时间内延迟自动恢复多频道扫描输出信号仅用于调谐到预期频率的某些预选信道，在预定频率上预期双向通信，而不会延迟仅预期单向通信的信道的自动扫描恢复。

2. 发明授权

US4027251A Radio receiver using frequency synthesizer 失效
标题翻译：无线电接收机采用频率合成器
公开(公告)号：US4027251A
公开(公告)日：1977-05-31
申请号：US545432
申请日：1975-01-30
申请人： George H. Fathauer , Cecil Ernest Mathis , Warren L. Williamson
发明人： George H. Fathauer , Cecil Ernest Mathis , Warren L. Williamson
IPC分类号： H03J7/18 , H04B1/26
CPC分类号： H03J7/18
摘要： There is disclosed a signal-seeking, scanning superheterodyne radio receiver using frequency synthesizing apparatus to generate the required local oscillator signals and capable of receiving signals on all four bands comprising the public service radio frequencies. The frequency synthesizing apparatus includes circuitry for selectively altering the frequencies of the reference oscillator signal and the offset oscillator signal. Alteration of the reference oscillator signal frequency permits economical use of the same frequency synthesizing apparatus in different bands wherein the spacing between adjacent frequencies is different, whereas alteration of the offset oscillator signal frequency permits the generation of local oscillator signals which fall between multiples of the reference signal frequency.
摘要翻译：公开了一种使用频率合成装置的信号寻找扫描超外差无线电接收机，用于产生所需的本地振荡器信号并且能够在包括公共服务无线电频率的所有四个频带上接收信号。频率合成装置包括用于选择性地改变参考振荡器信号和偏移振荡器信号的频率的电路。参考振荡器信号频率的改变允许在相邻频率之间的间隔不同的不同频带中经济地使用相同的频率合成装置，而偏移振荡器信号频率的改变允许产生落在参考的倍数之间的本地振荡器信号信号频率。

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