Patent ID: 6952239

Claim:
A sine generation circuit comprising: a first differential transistor and a second differential transistor, an emitter of the first transistor and an emitter of the second transistor being electrically connected to each other; and a current source electrically connected to the emitters of both the first transistor and the second transistor, wherein an input signal (θ) is applied between a base of the first transistor and a base of the second transistor, the first transistor and the second transistor are configured so that a sine-converted output signal (sin θ) of the input signal (θ) is generated at a collector of the first transistor and a reversed sine-converted output signal (−sin θ) of the input signal (θ) is generated at a collector of the second transistor, and the input signal (θ) is below +0.8 radian and above −0.8 radian.