公开(公告)号：US20010017573A1

公开(公告)日：2001-08-30

申请号：US09754192

申请日：2001-01-05

Applicant: Fox Enterprises, Inc., a Florida Corporation and Jet City Electronic, a Washington Corporation

Inventor： John W. Fallisgaard ,  Eugene S. Trefethan

IPC: H03L007/06 ,  H03L007/16 ,  H03B005/36

CPC classification number: H03L7/183 ,  H03B5/366 ,  H03B19/00 ,  H03B2201/0266 ,  H03J2200/10 ,  H03L7/0898

Abstract: A programmable crystal oscillator is provided having a memory for storing frequency-defining parameters. Typically, one of these parameters is used to program an adjustable capacitive load circuit coupled to a crystal to thereby adjust the crystal source frequency. Additional parameters are used to program the output frequency of a phase locked loop circuit coupled to receive the adjusted source frequency. A further parameter can also be used to divide the output frequency of the phase locked loop circuit to supply a specified output frequency. The oscillators can be manufactured as generic programmable crystal oscillators without regard for output frequency and then quickly programmed to produce customer-specified output frequencies with a high degree of accuracy.

Abstract translation: 提供了一种可编程晶体振荡器，其具有用于存储频率定义参数的存储器。 通常，这些参数之一用于对耦合到晶体的可调容性负载电路进行编程，从而调节晶体源频率。 附加参数用于编程耦合以接收经调整的源频率的锁相环电路的输出频率。 还可以使用另外的参数来分频锁相环电路的输出频率以提供指定的输出频率。 振荡器可以制造为通用可编程晶体振荡器，而不考虑输出频率，然后快速编程，以高精度产生客户指定的输出频率。

公开(公告)号：US20030122630A1

公开(公告)日：2003-07-03

申请号：US10367766

申请日：2003-02-19

Applicant: Fox Enterprises, Inc., a Florida corporation

Inventor： John W. Fallisgaard ,  Eugene S. Trefethan

IPC: H03B005/32

CPC classification number: H03L7/183 ,  H03B5/366 ,  H03B19/00 ,  H03B2201/0266 ,  H03J2200/10 ,  H03L7/0898

Abstract: A programmable crystal oscillator is provided having a memory for storing frequency-defining parameters. Typically, one of these parameters is used to program an adjustable capacitive load circuit coupled to a crystal to thereby adjust the crystal source frequency. Additional parameters are used to program the output frequency of a phase locked loop circuit coupled to receive the adjusted source frequency. A further parameter can also be used to divide the output frequency of the phase locked loop circuit to supply a specified output frequency. The oscillators can be manufactured as generic programmable crystal oscillators without regard for output frequency and then quickly programmed to produce customer-specified output frequencies with a high degree of accuracy.

Abstract translation: 提供了一种可编程晶体振荡器，其具有用于存储频率定义参数的存储器。 通常，这些参数之一用于对耦合到晶体的可调容性负载电路进行编程，从而调节晶体源频率。 附加参数用于编程耦合以接收经调整的源频率的锁相环电路的输出频率。 还可以使用另外的参数来分频锁相环电路的输出频率以提供指定的输出频率。 振荡器可以制造为通用可编程晶体振荡器，而不考虑输出频率，然后快速编程，以高精度产生客户指定的输出频率。