发明名称 |
TRANSMITTER WITH VERNIER MEASUREMENT |
摘要 |
A transmitter provides an output representative of a parameter. A generating circuit in the transmitter senses the parameter and provides charge packets having adjustable magnitudes to a measurement circuit. The measurement circuit measures the quantity of charge and provides a measurement signal representing the charge to a feedback circuit. The feedback circuit is controlled by the measurement signal and provides timed feedback signals to the generating means. The feedback signals control the generation and magnitude of the charge packets such that the charge coupled to the measurement circuit is finely balanced in a short measurement interval. The feedback means counts the number of charge packets provided during a measurement interval such that the numbers counted are representative of the sensed parameter. |
申请公布号 |
AU7705087(A) |
申请公布日期 |
1988.02.10 |
申请号 |
AU19870077050 |
申请日期 |
1987.07.14 |
申请人 |
ROSEMOUNT INC., |
发明人 |
ROGER L. FRICK;JOHN P. SCHULTE |
分类号 |
G01L9/12;G01D5/12;G01D5/24;G01R27/26 |
主分类号 |
G01L9/12 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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