Double-sampling highpass delta-sigma modulator
The Double-sampling highpass delta-sigma modulator consists of second order High Pass Delta-sigma Modulator (HPDSM), 3bit flash Analog to Digital Converter (ADC), Digital to Analog Converter (DAC) and clock generator. Fig. 1 show the second order HPDSM output connect to 3bit flash ADC, and flash ADC output enters to th..
The delta-sigma modulator not only minimizes the number of capacitors required in the feedback network but also enables chopper stabilization which makes the modulator immune to 1/f noise and DC offset.
48kHz 92-dB SNR Audio ADC
This IP is sigma-delta modulator for audio signal processing. This IP include sigma-delta modulator, reference generator and clock generator. The output signal is PDM (Pulse Density Modulation) type so can be used for audio A/D converting with additional decimation filter for PDM to PCM conversion.
16bit 85-dB SNDR Sigma-Delta AFE
This IP include 16-bit 85-dB SNDR Sigma-Delta Analog to Digital Converter and Low Noise PGA (Programmable Gain Amplifier) with x1 to x32 gain option. This IP is very suitable for sensor signal conditioning and energy metering application.
A 0.8-V 816-nW delta?sigma modulator for low-power biomedical
A distributed feedforward structure and bulk-driven operational transconductance amplifier are used in order to achieve efficient operation at a supply voltage of 0.8 V. Instead of conventional low-voltage amplifier architectures, our design uses folded-cascode amplifiers, although they are not used in most low-voltage..