Title:
【発明の名称】原子周波数標準のためのランプ発振器
Document Type and Number:
Japanese Patent JP3142296
Kind Code:
B2
Abstract:
An apparatus for providing excitation of a vapor discharge lamp includes a control circuit for controlling an oscillator circuit during an ignition mode of the vapor discharge lamp to establish and maintain a substantially constant DC voltage at an output of an oscillator transistor and to establish a current flow through the oscillator transistor at a first current level sufficient to ignite the vapor discharge lamp, and for controlling the oscillator after ignition of the vapor discharge lamp to maintain the substantially constant DC voltage at the output of the oscillator transistor while reducing the current flow through the oscillator transistor from the first current level to a second current level, and in preferred embodiments, includes circuitry to suppress unwanted blocking oscillations and optimize the dynamic range of the control circuitry.
Inventors:
Croquet jeff dee
Application Number:
JP52048996A
Publication Date:
March 07, 2001
Filing Date:
December 19, 1995
Export Citation:
Assignee:
Ephratom Time and Frequency Products Inc.
International Classes:
H03L1/02; H03L7/26; H03L5/02; H05B41/38; H05B41/392; H05B; (IPC1-7): H03L7/26; H03L5/02
Domestic Patent References:
| JP5583276A | ||||
| JP6448521A | ||||
| JP4505533A |
Other References:
【文献】米国特許4721890(US,A)
【文献】米国特許4456891(US,A)
【文献】米国特許4456891(US,A)
Attorney, Agent or Firm:
Minoru Nakamura (6 outside)