Patent ID: 8089008

Claim:
A position indicator for encoding operational information represented by a continuous variable and transmitting the encoded operational information to a tablet, comprising: a time-constant circuit configured to encode the operational information represented by a continuous variable; a voltage comparison circuit; and a detection voltage setting circuit, wherein the time-constant circuit includes a plurality of time-constant sub-circuits configured to be selectively switched among them, the plurality of time-constant sub-circuits each having an element whose characteristic continuously changes in response to the operational information represented by a continuous variable and each having a time constant which changes in response to a change in the characteristic of the element, each time constant having a different variable range, the detection voltage setting circuit selectively outputs a voltage value from a plurality of voltage values, the voltage comparison circuit compares a voltage output from the time-constant circuit with a voltage output from the detection voltage setting circuit, and based on the comparison result, the time constant of the time-constant circuit and the voltage value output from the detection voltage setting circuit are changed.