| 摘要 |
PURPOSE:To provide the modulator with less adjusting points and with the low power consumption. CONSTITUTION:The modulator is provided with a DELTASIGMA modulator 1 converting a modulation signal Mo into a binary signal to make one part of the frequency component after the signal conversion into the desired analog signal and a multiplier circuit 2 inputting a binary signal D1 from the DELTASIGMA modulator 1 and a carrier wave signal Ca and outputting the product between the carrier wave signal Ca and the binary signal D1. Thus, the modulator can be constructed by a switching circuit as big as an analog circuit, resulting in realizing the low-power and high-accurate modulator. |
