| 摘要 |
A phase shift circuit includes a first sine generation circuit generating a sine-converted output signal (sin theta) of the phase shift input signal (theta) and a reversed sine-converted output signal (-sin theta) of the phase shift input signal (theta), a cosine generation circuit generating a cosine-converted output signal (cos theta) of the phase shift input signal (theta), a first multiplication circuit, a second multiplication circuit, a third multiplication circuit, a fourth multiplication circuit, a first addition circuit adding an output signal of the first multiplication circuit to an output signal of the second multiplication circuit, and a second addition circuit adding an output signal of the third multiplication circuit to an output signal of the fourth multiplication circuit. This configuration makes the construction of a phase shift circuit for tint adjustment simple because of a coordinate transformation embedded in the configuration.
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