Digital pulse width modulator based on IODELAY firmware
A width modulation, digital pulse technology, applied in the field of electronics, can solve the problems such as the basic clock frequency can only reach 1MHz, the design process requirements are high, the structure composition is complex, etc., and the effect of low cost, fine resolution, and simple manufacturing process can be achieved.
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[0023] The present invention will be further described in detail below in conjunction with the accompanying drawings.
[0024] The present invention provides a high-precision digital pulse width modulator, such as figure 1 As shown, the modulator consists of a clock generation module, a synchronous counting module, an IODELAY firmware module and an asynchronous signal generation module. The specific circuit diagram of the four modules is as follows Figure 2 to Figure 5 shown.
[0025] First divide the input 11-bit array dc (10:0) into upper 5 bits dc (10:6) and lower 6 bits dc (5:0).
[0026] exist figure 2 In the clock generation module shown, DCM×4 is a 4-fold frequency multiplier, and the CLK signal is an input clock signal with a frequency of 50MHz. After the CLK clock signal is spread by the DCM×4 frequency multiplier, the basic clock signal CK with a frequency of 200MHz is obtained, and then the basic clock signal CK is sent to the synchronization counting module a...
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