×

Multimeter with charging system

  • US 8,395,351 B2
  • Filed: 03/23/2011
  • Issued: 03/12/2013
  • Est. Priority Date: 12/27/2010
  • Status: Expired due to Fees
First Claim
Patent Images

1. A multimeter, comprising:

  • a main body;

    two probes extending from the main body;

    a battery unit arranged in the main body; and

    a charging system arranged in the main body and configured for charging the battery unit, the charging system comprising;

    a microcontroller;

    an external input voltage sampling circuit electrically connected to the microcontroller, and configured for sampling an external input voltage from the probes;

    a battery voltage sampling circuit electrically connected to the microcontroller, and configured for sampling a voltage of the battery unit; and

    a voltage regulator circuit electrically connected the microcontroller, wherein the microcontroller compares the sampled external input voltage and the sampled voltage of the battery unit, and controls the voltage regulator circuit to regulate the external input voltage to be applicable to the battery unit based on the comparison.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×