Digital multi-meter
First Claim
1. A multi-meter comprising:
- a first input terminal;
a second input terminal;
a display;
a first current measuring circuit between the first input terminal and the second input terminal, the first current measuring circuit operable for measuring current in a first current range;
a second current measuring circuit between the first input terminal and the second input terminal, the second current measuring circuit operable for measuring current in a second current range; and
a controller including a first current measuring input, a second current measuring input, a processor, and a memory, the controller configured toreceive a first signal from the first current measuring circuit at the first current measuring input,receive a second signal from the second current measuring circuit at the second current measuring input,compare the first signal to a predetermined threshold value,determine a value for a current being measured based on the first signal when the first signal is below the predetermined threshold value,determine a value for the current being measured based on the second signal when the first signal is greater than or approximately equal to the predetermined threshold value,generate an output signal related to the determined value for the current, andprovide the output signal to the display.
1 Assignment
0 Petitions
Accused Products
Abstract
A multi-meter including a current input, a common input, a display, a first current measurement circuit, a second current measurement circuit, and a controller. The controller includes a first input and a second input. The controller operable to receive a first voltage from the first current measurement circuit at the first input, receive a second voltage from the second current measurement circuit at the second input, determine a value for a current being measured based on the first voltage if the first voltage is below a predetermined threshold, determine a value for a current being measured based on the second voltage if the first voltage is above the predetermined threshold, generate an output signal related to the determined value for the current, and provide the output signal to the display.
57 Citations
11 Claims
-
1. A multi-meter comprising:
-
a first input terminal; a second input terminal; a display; a first current measuring circuit between the first input terminal and the second input terminal, the first current measuring circuit operable for measuring current in a first current range; a second current measuring circuit between the first input terminal and the second input terminal, the second current measuring circuit operable for measuring current in a second current range; and a controller including a first current measuring input, a second current measuring input, a processor, and a memory, the controller configured to receive a first signal from the first current measuring circuit at the first current measuring input, receive a second signal from the second current measuring circuit at the second current measuring input, compare the first signal to a predetermined threshold value, determine a value for a current being measured based on the first signal when the first signal is below the predetermined threshold value, determine a value for the current being measured based on the second signal when the first signal is greater than or approximately equal to the predetermined threshold value, generate an output signal related to the determined value for the current, and provide the output signal to the display. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
-
Specification