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US 6,445,444 B1Granted
Self-calibrating precision timing circuit and method for a laser range finder
AssigneeLaser Technology, Inc.
InventorJeremy G. Dunne
Life of this patent
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Abstract
A highly precise range measurement instrument is made possible through the use of a novel and efficient precision timing circuit which makes use of the instruments internal central processing unit crystal oscillator. A multi-point calibration function includes the determination of a “zero” value and a “cal” value through the addition of a known calibrated pulse width thereby providing the origin and scale for determining distance with the constant linear discharge of capacitor.
Claims18
A transimpedance amplifier comprising:
- a first transistor having first and second terminals thereof respectively coupled to first and second voltage lines and a third terminal thereof coupled to an input node;
- a second transistor having first and second terminals thereof respectively coupled to said first and second voltage lines and a third terminal thereof coupled to said second terminal of said first transistor;
- a third transistor having first and second terminals thereof respectively coupled to said second and first voltage lines and a third terminal thereof coupled to said third terminal of said first transistor;
- and
- a fourth transistor having first and second terminals thereof respectively coupled to said second and first voltage lines and a third terminal thereof coupled to said second terminal of said third transistor, said first terminal of said fourth transistor being coupled to an output node.
2 more elements
Dependencies are inferred from the claim text.