Patent ID: 6850178
Filing Date: 2005-02-01
Classification: G04F,H03M

Abstract:
1. An analog-to-digital conversion method for converting an input voltage into numerical data, comprising the steps of: applying the input voltage to a first pulse delay circuit, which has a plurality of first delay units connected in tandem, as a signal to be used to control a delay time to be given by each first delay unit, the first delay units being realized with gate circuits; applying the input voltage to a second pulse delay circuit, which has a plurality of second delay units connected in tandem, as a signal to be used to control a delay time to be given by each second delay unit in a direction opposite to the direction in which the delay time to be given by said first delay circuit is controlled, the second delay units being realized with gate circuits; and activating said pulse delay circuits, numerically calculating the ratio of transfer rates at which pulsating signals are transferred within said purse delay circuits, and thus convening the input voltage into numerical data.