Position detecting device and position pointing device therefor

In combination,

• a source for deriving a signal including N binary bits, where N is an integer greater than one,
• a resonant circuit coupled with the source and having more than N detectable characteristics controlled by the N bits, a plurality of said characteristics being simultaneously detectable.

A position pointing device for use with a tablet for emitting a first AC field having a predetermined frequency, the device comprising

• a resonant circuit having a resonant frequency approximately equal to the predetermined frequency and arranged so it can be coupled with the field,
• a source for deriving a signal including N binary bits, where N is an integer greater than one, the resonant circuit having a reactance with variable discrete values and a conductance with variable discrete values, the number of said variable discrete values exceeding N, the source and resonant circuit being coupled together so all of the variable discrete values are controlled by the values of the binary bits,
• and circuitry coupled with the resonant circuit so that in response to the first AC field being coupled to the resonant circuit the resonant circuit emits a second AC field having detectable wave characteristics controlled by the values of the variable reactance and conductance.

In combination,

• a source for deriving a signal including N binary bits, where N is an integer greater than one, a resonant circuit having a reactance with variable discrete values and a conductance with variable discrete values, the number of said variable discrete values exceeding N, the source and resonant circuit being coupled together so all of the variable discrete values are controlled by the values of the binary bits.

A position pointing device for use with a tablet for emitting a first AC field having a predetermined frequency, the device comprising

• a resonant circuit having a resonant frequency approximately equal to the predetermined frequency and arranged so it can be coupled with the field,
• a source for deriving a signal including N binary bits, where N is an integer greater than one, the resonant circuit being coupled with the source and having more than N detectable characteristics controlled by the N bits, a plurality of said characteristics being simultaneously detectable,
• and circuitry coupled with the resonant circuit so that in response to the first AC field being coupled to the resonant circuit the resonant circuit emits a second AC field having detectable wave characteristics controlled by the plural detectable characteristics of the resonant circuit.