JPH0360017U - - Google Patents

Description

[Brief explanation of drawings]

Figures 1 to 4 show an embodiment of the rotary encoder according to this invention, where Figure 1 is a functional block diagram, Figure 2 is a hardware logic circuit diagram, Figure 3 is a timing chart, and Figure 4 is a diagram. It is a flowchart. Figures 5 and 6 show conventional examples;
The figure is a hardware logic circuit diagram, and FIG. 6 is a timing chart. Explanation of main symbols, 1...Schmitt circuit, 2...
...Interrupt judgment gate circuit, 3...Flip-flop circuit, 4...Input port, 5...Central processing unit.

Claims (1)

[Claims for Utility Model Registration] An interrupt signal generation circuit that determines a level difference between two phase output signals of a rotary encoder and generates an interrupt signal to a microcomputer; A control circuit for a rotary encoder including a rotation direction determination means for determining the rotation direction, an interrupt signal generation means for generating an interrupt signal at both rising and falling edges of the phase output signal, and an output of the interrupt signal generation means. A resolution variable means is provided which operates to increase the resolution of the rotary encoder depending on the signal, and detects both the rising and falling edges of the phase output signal to generate an interrupt signal and to determine whether the phase output signal level of the two phases changes. 1. A control circuit for a rotary encoder, characterized in that the control circuit is configured to increase resolution by making it possible to determine that the rotary encoder is in a one-step state even in a state of .