Application of Quadruple Frequency Phase Discrimination and Counting Circuit in Motion Controller;

And then introduces the method of accomplishing the direction, quadruple frequency and count using EPM7128S.

According to the system block diagram,We design some VHDL programs of address decoder and quadruple frequency phase discrimination of NC biaxial position detection system,and simulate the hardware design of the system.

The paper introduces the fourfold frequency circuit design for photoelectric encoder based on MCU.

The main characters of EMP7128 were briefly introduced,and design principle of fourfold frequency and interface circuits were analyzed in detail.

The Fourth Harmonic Generation in BBO Crystal;

In this paper,a diode-pumped Q-switched Nd∶GdVO4laser which produced ultraviolet output at266nm byusing BBO crystal single pass fourth harmonic generation is reported.

This article researches on the incremental opto-electric encoder and analyze its fourfold frequency multiplication principle,it gives a method based on FPGA to multiply the signal of the incremental opto-electric encoder,differentiates its phase and counts its number,the controled object s precision of measure and control can be heightened.

The fourfold frequency multiplication principle of photoelectric pulse transducer and its circuit by means of CPLD is totally analysed and designed in this paper.

Ka-band broadband millimeter-wave quadrupler is designed and developed in this paper.

This thesis presents the design and manufacture of a V-band frequency quadrupler.

The thesis presents the research and design of a V-band frequency quadrupler.

Quadrupler is broadly used in MMIC.