A 20 MHz BP-PWM and BP-DSM Class-D PA in 0.18 μm CMOS
نویسندگان
چکیده
This paper presents a Class-D power amplifier for bandpass pulse width modulated (BP-PWM) and bandpass deltasigma modulated (BP-DSM) signals at 20 MHz. A 1-bit 6-th order topology is used in the ∆Σ-modulator. Integral noise shaping is used in the generation of the bandpass pulse width modulated signal. A two sided pulse width modulation is used with a 6-bit 4th-order noise shaper. The push-pull amplifier part of the Class-D amplifier was fabricated on a 0.18 μm CMOS process and the bandpass filter was composed of a LC ladder network realised with discrete components.
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