Abstract: An electronic device includes: a voltage controlled delay line including delay elements configured to delay an input clock signal and output the clock signal, a delay control element configured to control a delay time of the clock signal delayed by the delay elements in accordance with a control voltage, a delay sensitivity adjustment circuit configured to adjust a ratio of an amount of change of the delay time to an amount of change of the control voltage, and a plurality of delay circuits; and a control voltage generation circuit configured to compare a phase of an output signal of any one of the plurality of delay circuits and a phase of the clock signal, generate the control voltage so as to match the phase of the output signal and the phase of the clock signal based on the comparison result, and output the control voltage to the delay control element.

Abstract: An electronic component includes: a first amplifier configured to amplify one of differential signals; a second amplifier configured to amplify another one of the differential signals; a sensor configured to measure voltages of a first output signal outputted from the first amplifier and a second output signal outputted from the second amplifier; and a controller configured to control, based on the voltages measured by the sensor, either one or both of a current and a resistance value of the first amplifier so that a common voltage of the first output signal and a common voltage of the second output signal are approximate to each other.

Abstract: A power supply voltage output circuit includes: a power supply voltage generation unit generating a power supply voltage to be supplied into a ring oscillator; a reference clock oscillator oscillating a reference clock with respect to a clock oscillated by the ring oscillator; a phase difference detection unit detecting a phase difference between the clock from the ring oscillator and the reference clock from the reference clock oscillator; a filter unit smoothing an output of the phase difference detection unit; and a PWM signal generation unit generating a PWM signal based on an output of the filter unit such that the phase difference approaches zero.

Abstract: A variable delay circuit 1 includes: a multistage delay circuit 20 constructed by connecting delay elements D1 to Dn in series; a selecting unit 21 which selects one delayed signal obtained by introducing different amounts of delay by passing a reference clock through one or more of the delay elements D1 to Dn; a decision unit 23 which, at decision timing synchronized to the reference clock, makes a decision on the logic state of each delayed signal sequentially selected from among the plurality of delayed signals; and a changing point detection unit 24 which detects at least two delay elements Dm and Dk where a change has occurred in the logic state of the reference clock at the decision timing, and wherein the difference (k?m) between the numbers of delay elements through which the clock signal has passed until reaching one of the two detected delay elements Dm and Dk is used as the number of delay elements that provides a desired delay time.

Abstract: a power supply voltage output circuit includes: a power supply voltage generation unit generating a power supply voltage to be supplied into a ring oscillator; a reference clock oscillator oscillating a reference clock with respect to a clock oscillated by the ring oscillator; a phase difference detection unit detecting a phase difference between the clock from the ring oscillator and the reference clock from the reference clock oscillator; a filter unit smoothing an output of the phase difference detection unit; and a PWM signal generation unit generating a PWM signal based on an output of the filter unit such that the phase difference approaches zero.

Abstract: A variable delay circuit 1 includes: a multistage delay circuit 20 constructed by connecting delay elements D1 to Dn in series; a selecting unit 21 which selects one delayed signal obtained by introducing different amounts of delay by passing a reference clock through one or more of the delay elements D1 to Dn; a decision unit 23 which, at decision timing synchronized to the reference clock, makes a decision on the logic state of each delayed signal sequentially selected from among the plurality of delayed signals; and a changing point detection unit 24 which detects at least two delay elements Dm and Dk where a change has occurred in the logic state of the reference clock at the decision timing, and wherein the difference (k?m) between the numbers of delay elements through which the clock signal has passed until reaching one of the two detected delay elements Dm and Dk is used as the number of delay elements that provides a desired delay time.