Patent ID: 8284092
Filing Date: 2012-10-09
Classification: H03M

Abstract:
1. An analog-to-digital converter comprising: an annular delay circuit that includes a plurality of delay units connected in an annular shape, each of the plurality of delay units delaying a pulse current that is input to each of the plurality of delay units; a first current source that outputs an electric current, in accordance with an input analog signal, to first delay units a second current source that outputs the electric current, in accordance with the input analog signal, to second delay units; and a digital signal generation unit that generates a digital signal in accordance with a number of circulations per predetermined period of time of the pulse current circulating around the annular delay circuit, wherein the plurality of delay units includes the first delay units and the second delay units, and wherein each of the first delay units and each of the second delay units are not adjacent to each other.