Pulse generator
AssigneeDensei-Lambda Kabushiki Kaisha
InventorEiji Takegami
Life of this patent
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Abstract
Without shortening clock pulse duration serving as a unit time of a pulse generator, a pulse-width control is possible in which pulse duration varies in increments of a time length shorter than the unit time. A time width Ton_s of a pulse width finely dividing signal Vs from a DSP 17 varies by clock pulse duration Tclk in response to variations in an output voltage Vo. A time control circuit 18 that has received the pulse width finely dividing signal Vs generates, in a control signal Vd, varying segments 30, 31 for making the time width of the pulse drive signal Vg vary by a shorter time ΔTd than the clock pulse duration Tclk. Consequently, resolution of the time width of the pulse drive signal Vg is improved so as to be higher than the clock pulse duration Tclk, which is time resolution of the DSP 17 itself.
Claims10
(canceled)
A pulse generator for generating a control pulse that varies in pulse width comprising:
- a variable signal output means for outputting pulse width dividing signals whose pulse time widths vary in increments of a unit time,
- a time control means for detecting variations in time widths of said pulse width dividing signals to vary a pulse width of said control pulse in increments of a time length shorter than the unit time, wherein
- the pulse width dividing signals output from said variable signal output means comprise:
- a pulse width roughly dividing signal with a time width approximately equal to a pulse width of said control pulse and
- a pulse width finely dividing signal for regulating the pulse width of said control pulse by said unit time,
- wherein said time control means roughly determines the pulse width of said control pulse by means of said pulse width roughly dividing signal and then finely regulates the pulse width of said control pulse in increments of a time length shorter than said unit time by means of said pulse width finely dividing signal.
A pulse generator for generating a control pulse that varies in pulse width comprising:
- a variable signal output means for outputting a pulse width roughly dividing signal with a time width approximately equal to a pulse width of said control pulse and a pulse width finely dividing signal whose phase difference from a phase of said pulse width roughly dividing signal varies by a unit time, and
- a time control means for roughly determining the pulse width of said control pulse and detecting variations in said phase difference to vary a pulse width of said control pulse in increments of a time length shorter than said unit time.
A pulse generator for generating a control pulse that varies in pulse width comprising:
- a pulse generating means for generating said control pulse when an input voltage exceeds a predetermined threshold value,
- an operating voltage regulating means for regulating a voltage level of an operating voltage and
- a time control means for generating a pulse generating signal for sloping the voltage level with said operating voltage defined as an upper limit to regulate a pulse width of said control pulse by making said pulse generating signal, that varies depending on said voltage level of the operating voltage, into said input voltage.
A pulse generator for generating a control pulse that varies in pulse width depending on an objective under monitoring comprising:
- a pulse generating means for generating said control pulse when an input voltage exceeds a predetermined threshold value,
- a threshold voltage regulating means for varying a voltage level of said threshold value depending on said objective under monitoring, and
- a time control means for generating a pulse generating signal for sloping the voltage level to regulate a pulse width of said control pulse by making the pulse generating signal into said input voltage.
Dependencies are inferred from the claim text.