0.5 V analog integrated circuits

Chapter · December 2005with4 Reads
DOI: 10.1007/1-4020-3885-2_15


    Semiconductor technology scaling has enabled function density increases and cost reductions by orders of magnitudes, but for
    shrinking device sizes the operating voltages have to be reduced. As we move into the nanoscale semiconductor technologies,
    power supply voltages well below 1 V are projected. The design of MOS analog circuits operating from a power supply voltage
    of 0.5 V is discussed in this paper. The scaling of traditional circuit topologies is not possible anymore and new circuit
    topologies and biasing strategies have to developed. Several design examples are presented. The circuit implementations of
    gate and body-input 0.5 V operational transconductance ampli.ers and their robust biasing are discussed. These building blocks
    are combined for the realization of active varactor-tuned RC .lters operating from 0.5 V using standard devices with a ∣VT∣ of 0.5V in a standard 0.18 μm CMOS technology.