A pointer detection apparatus , comprising: (a) a conductor pattern including a plurality of first conductors disposed in a first direction (Y) and a plurality of second conductors disposed in a second direction (X) which crosses the first direction (Y); (b) a code string signal production circuit configured to produce a plurality of code signals, each having the same code string and a phase different from each other, and to supply the plurality of code signals to the plurality of first conductors ; (c) a signal detection circuit connected to the plurality of second conductors and configured to receive signals from the plurality of second conductors generated in response to the plurality of code signals supplied to the plurality of first conductors , and to detect and output a signal corresponding to a variation of capacitance between the conductor pattern and a pointer ; (d) an analog to digital conversion circuit configured to convert the signal output from the signal detection circuit into a digital signal comprising a word string formed of a plurality of bits; (e) a correlation detection circuit configured to determine correlation values between the plurality of code strings provided for correlation and the word string output from the analog to digital conversion circuit ; (f) a memory circuit configured to store the correlation values, each having a plurality of bits successively output from the correlation detection circuit ; and (g) a position calculation circuit configured to calculate a position on the conductor pattern pointed to by the pointer based on the correlation values, characterized in that the number of the plurality of signals to be produced by the code string signal production circuit is 4N - 1, N being an integer equal to or greater than 2, and the code string signal production circuit is further configured to produce a predetermined number of compensation signal(s), the number of the compensation signal(s) being set such that the sum of 4N - 1 and the number of the compensation signal(s) is an even number and a sum total of signal values output from the plurality of second conductors becomes zero in case the pointer is not present on the conductor pattern . (a) a conductor pattern including a plurality of first conductors disposed in a first direction (Y) and a plurality of second conductors disposed in a second direction (X) which crosses the first direction (Y); (b) a code string signal production circuit configured to produce a plurality of code signals, each having the same code string and a phase different from each other, and to supply the plurality of code signals to the plurality of first conductors ; (c) a signal detection circuit connected to the plurality of second conductors and configured to receive signals from the plurality of second conductors generated in response to the plurality of code signals supplied to the plurality of first conductors , and to detect and output a signal corresponding to a variation of capacitance between the conductor pattern and a pointer ; (d) an analog to digital conversion circuit configured to convert the signal output from the signal detection circuit into a digital signal comprising a word string formed of a plurality of bits; (e) a correlation detection circuit configured to determine correlation values between the plurality of code strings provided for correlation and the word string output from the analog to digital conversion circuit ; (f) a memory circuit configured to store the correlation values, each having a plurality of bits successively output from the correlation detection circuit ; and (g) a position calculation circuit configured to calculate a position on the conductor pattern pointed to by the pointer based on the correlation values, <EOS>