Patent ID: 9350322
Filing Date: 2016-05-24
CPC Classification: H03H,H03K,H04L

Claim Text:
1. A signal output device, comprising: an output section that is input with a base waveform signal provided with a signal level transition period within each cycle, wherein a signal level of the base waveform signal in a signal level non-transition period before or after the signal level transition period is differentiated according to a value of a first bit of output-target data, and that outputs an output signal corresponding to the input base waveform signal to an output transmission path; and a control section that, in the signal level non-transition period, matches an output impedance of the output section to a characteristic impedance of the output transmission path, and also matches the output impedance of the output section to the characteristic impedance of the output transmission path in the signal level transition period in a case in which a second bit of the output-target data is a first value, and generates a mismatch between the output impedance of the output section and the characteristic impedance of the output transmission path in the signal level transition period in a case in which the second bit of the output-target data is a second value, so as to cause generation of a change in waveform in the output signal in the signal level transition period such that the absolute value of the signal level of the output signal exceeds a preset threshold value.