Patent ID: 7405561

Claim:
A sensing apparatus having a fluxgate, comprising: a fluxgate module configured to output an analog signal corresponding to terrestrial magnetism using a fluxgate including a magnetic substance core and a driving coil; and an analog-to-digital (A/D) converter configured to convert an analog signal output from the fluxgate module into a digital signal, wherein the fluxgate module includes first and second current amplifiers connected to respective first and second ends of the driving coil, and a pulse restricting part configured to supply an output signal to operate the first and second current amplifiers, wherein the output signal is a driving pulse while the A/D converter is converting the analog signal and is no pulse when the digital signal is output from the A/D converter, wherein the pulse restricting part includes: a pulse generator configured to generate the driving pulse, a pulse controller configured to output a control pulse to control the operation of the fluxgate, and a logic gate configured to logically operate on the driving pulse and the control pulse and to supply the output signal according to the results of the logical operation to the first and second current amplifiers.