Patent ID: 7016432
Filing Date: 2006-03-21
Classification: G06K,H03C,H03F,H03K,H04L

Abstract:
1. A modulating circuit comprising: first signal output means for outputting a first output signal having a first predetermined phase with respect to that of an input signal; second signal output means for outputting a second output signal having a second predetermined phase with respect to that of said input signal; gate means for gating at least second output signal; calculation means for adding or subtracting said first output signal and said second output signal; and controls means for controlling the operation of said gate means in response to a logic level of input data, wherein said first signal output means outputs said first output signal from a first antenna; said second signal output means outputs said second output signal from a second antenna; and said calculation means is formed by way of an electromagnetic coupling between said first antenna and said second antenna.