A 6-bit digital to analogue converter based on current mirrors

In this article, a digital to analogue converter (DAC) based on multi-weighted current sources is proposed. This research requires only three kinds of current sources for a 6-bit DAC. The proposed DAC is implemented by 0.18 µm CMOS technology. The post-layout simulations of integral nonlinearity and differential nonlinearity are 0.076 and 0.099 LSB, respectively. The core area of the chip is 640 µm2. The DAC consumes 3.5 mW at the sample rate of 1.6 GHz with a supply voltage of 1.8 V. The specifications of the proposed DAC make it suitable for a portable device.