发明名称 |
Low power crystal oscillator having improved long term and short term stability |
摘要 |
An oscillator circuit having improved long term and short term phase stability. A source follower provides a signal to a bipolar transistor. The bipolar transistor is fed with a current from a current mirror which may be selectively controlled. A piezoelectric crystal and a high resistance element are connected in parallel from the collector of the bipolar transistor to the input of the source follower. The drive voltage to the piezoelectric crystal is controlled by the current mirror to improve long term frequency stability.
|
申请公布号 |
US6313712(B1) |
申请公布日期 |
2001.11.06 |
申请号 |
US20000592704 |
申请日期 |
2000.06.13 |
申请人 |
INTERNATIONAL BUSINESS MACHINES CORPORATION |
发明人 |
MOURANT JEAN-MARC;SHKAP DANIEL |
分类号 |
H03B5/36;(IPC1-7):H03B5/36 |
主分类号 |
H03B5/36 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|