Invention Grant
- Patent Title: Circuit and method for controlling an IR source for an analytical instrument
- Patent Title (中): 用于控制分析仪器的红外源的电路和方法
-
Application No.: US13400284Application Date: 2012-02-20
-
Publication No.: US09243954B2Publication Date: 2016-01-26
- Inventor: Peter M. Willis , Joshua Allen Slavens
- Applicant: Peter M. Willis , Joshua Allen Slavens
- Applicant Address: US MI St. Joseph
- Assignee: Leco Corporation
- Current Assignee: Leco Corporation
- Current Assignee Address: US MI St. Joseph
- Agency: Price Heneveld LLP
- Main IPC: G01J5/20
- IPC: G01J5/20 ; G01J3/433 ; G01J3/10 ; G01J5/02 ; G01J5/10
Abstract:
A pulse-width-modulated voltage is applied to an IR emitter during the on-time of a primary drive voltage having a frequency of about 2.5 Hz in order to control the power to a predetermined desired level. The secondary modulation is at about 800 Hz. The lower response time of the emitter will, in effect, filter the higher frequency, and it will appear that an average power is being applied to the emitter during the on-time.
Public/Granted literature
- US20120228502A1 CIRCUIT AND METHOD FOR CONTROLLING AN IR SOURCE FOR AN ANALYTICAL INSTRUMENT Public/Granted day:2012-09-13
Information query
