Conversão Dsb/ssb a Capacitores Chaveados Usando Transformadores De Hilbert Recursivos

This work presents the complete implementation of a switched-capacitor double-sideband (DSB) to singlesideband (SSB) converter, using discrete components. In order to obtain efficient SSB modulation, a Hilbert Transformer has been used. The implementation of the Hilbert Transformer through recursive allpass transfer functions allows good dynamic range and low sensitivity to errors on implemented capacitance ratios. The sampling rate of the SSB signal can be halved without loss of information, leading to circuit complexity reduction and savings in power consumption. Experimental results are provided, to verify the complete DSB to SSB conversion. A few practical aspects concerning the possible monolithic CMOS implementation of this circuit are considered.