Counter control type delay-locked loop circuit with mistaken locking correction mechanism
A delay phase-locked loop and counter technology, applied in the automatic control of power, electrical components, etc., can solve problems such as indetermination, error locking, narrow frequency range, etc., achieve multi-phase output, wide frequency range, and improve chip finished products rate effect
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[0027] In order to make the technical features of the present invention more obvious and understandable, the present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0028] Such as image 3 As shown, the structure of the counter-controlled delay phase-locked loop circuit with error locking correction mechanism of the present invention includes 4 functional modules: digital delay line 1, phase detector 2, add / subtract counter 3, clock phase operation circuit 4. The digital delay line 1 is composed of (n+3) identical delay units, where n is any positive integer, and each delay unit is controlled by the output signal of the up / down counter 3, and the phase detector 2 compares the input clock and delay The phase of the output clock after the hour is controlled according to the comparison result of the add / subtract counter 3, and the clock phase operation circuit 4 selects the delay signal output by some delay units for pro...
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