Patent ID: 6262613
Filing Date: 2001-07-17
Classification: H03K

Abstract:
A pulse duration changer for producing an output pulse signal different in pulse duration from an input pulse signal, comprising:an input circuit supplied with said input pulse signal, and generating a first internal pulse signal synchronous with said input pulse signal;an output circuit supplied with a preliminary output signal different in pulse duration from said input pulse signal, and generating said output pulse signal synchronous with said preliminary output pulse signal; anda pulse width regulating circuit, connected between said input circuit and said output circuit, which initiates a control sequence in response to said first internal pulse signal and which produces a control signal and which is used for defining the pulse duration of said preliminary output signal,wherein said pulse width regulating circuit includes:a pulse width squeezer responsive to said first internal pulse signal for counting a first delay time, producing a second internal pulse signal substantially synchronous with said first internal pulse signal and shorter in pulse duration than said input pulse signal and terminating the pulse duration of said second internal pulse signal when said first delay time has expired,a pulse width stretcher responsive to said second internal pulse signal for counting a second delay time, producing said control signal in response to said second internal pulse signal and terminating said control signal when said second delay time has expired, anda first logic circuit having input nodes supplied with said control signal and said first internal pulse signal and responsive to said control signal for producing said preliminary output pulse signal.