In one embodiment, at least one resonant circuit in a stylus receives a first signal from a touch sensor of a device. The first signal is received at the resonant circuit by capacitive coupling between the resonant circuit and a conductive element of the device's touch sensor. A second signal based on the first signal and at least one of the at least one resonant circuit is then transmitted from the stylus to the device by capacitive coupling between the stylus and the touch sensor of the device.