专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US3990021A Surface wave multifrequency oscillator 失效
标题翻译：表面波多频振荡器
公开(公告)号：US3990021A
公开(公告)日：1976-11-02
申请号：US347106
申请日：1973-04-02
申请人： Clinton S. Hartmann , Steven J. Bomba , Ralph F. Tenny
发明人： Clinton S. Hartmann , Steven J. Bomba , Ralph F. Tenny
IPC分类号： H03B5/30 , H03B5/32
CPC分类号： H03B5/326
摘要： A variable frequency VHF or UHF band oscillator is disclosed. Principal control over the precise location and stability of the frequency of oscillation is provided by a surface wave delay line in the regenerative feedback path of a broadband amplifier. The surface wave delay line is capable of passing substantial energy within each of a plurality of very narrow passbands. Controls are provided for ensuring that at any given time the circuit can oscillate only at the resonant frequency of one of these passbands. Selection of the frequency of oscillation is in accordance with an externally applied digital frequency select signal.
摘要翻译：公开了一种变频VHF或UHF频带振荡器。通过宽带放大器的再生反馈路径中的表面波延迟线提供对振荡频率的精确位置和稳定性的主要控制。表面波延迟线能够在多个非常窄的通带内的每一个内传递大量的能量。提供控制以确保在任何给定时间，电路只能在这些通带之一的谐振频率处振荡。选择振荡频率是根据外部施加的数字频率选择信号。

2. 发明授权

US3968444A Skip band tuner 失效
标题翻译：跳频调谐器
公开(公告)号：US3968444A
公开(公告)日：1976-07-06
申请号：US522675
申请日：1974-11-11
申请人： Ralph F. Tenny
发明人： Ralph F. Tenny
IPC分类号： H03J5/02 , H03J7/28 , H04B1/32
CPC分类号： H03J5/0245 , H03J5/029 , H03J7/28
摘要： A digital tuning controller is provided which utilizes the storage of codes relating to the location and bandwidth of unused or illegal frequency bands to control a frequency acquisition operation with minimum circuitry.A two digit keyboard entry corresponding to a selected channel number is stored. First counter means indicates a current channel location. Second counter means counts regularly spaced frequency markers produced as the band is scanned to increment the first counter. A comparator signals coincidence between the content of the first counter and the keyboard entry. A third counter counts the frequency markers for comparison with the current output state of a read only memory (ROM) having stored codes corresponding to the location and bandwidth of the unused frequency bands. Upon coincidence, the third counter is reset, the second counter is inhibited and the next succeeding location of the ROM is addressed to provide an output state indicating the bandwidth of the skip band. Upon coincidence again occurring between the ROM and the third counter, the second counter is activated to resume counting and the tuning operation continues until either another skip band is reached or the selected channel is acquired.
摘要翻译：提供数字调谐控制器，其利用与未使用或非法频带的位置和带宽相关的代码的存储来以最小的电路来控制频率获取操作。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式