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The analog front-end of an ECBM transceiver operating from a single 5-V supply is described. The chip performs pulse shaping and line driving in the transmit section with hybrid function, equalization, A/D (analog-to-digital), D/A automatic gain control, threshold detection for PLL (phase-locked loops) and weak-up in the receive section. The chip dissipates about 160 mW in normal operation mode and...
A 6th order band-pass switched-capacitor (S.C.) filter that requires only 500 nA of total supply current has been designed and fabricated in a 2 ??m CMOS technology. The filter is part of an implantable device powered by a ?? 1.2 V battery, can drive up to 30 pF of capacitive load, and uses a 2 kHz master clock. Substantial reduction in the power consumption has been achieved by using a novel amplifier...
The first floating CMOS bandgap voltage reference is presented. The circuit is very suitable for precision applications in fully differential analog circuits. lt generates a continuous time low impedance voltage of 2.48V ?? 24 mV before trimming. The experimental prototype occupies 1800 mils square and dissipates 6 mW with a single supply voltage of 5V. Temperature stability is better than 20 ppm/C...
A CMOS differential buffer amplifier for ISDN applications is reported. The chip operates from a single 5 V power supply and can deliver a 6 Vpp 80 kHz signal into a load of 100 ohm and/or 300 pF with a THD of about 0.25 %. The circuit main feature is its PSRR which remain practically constant from de to several hundred kHz around - 75 dB for both positive and negative supplies with the common mode...
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