This paper proposes a low noise fractional-N frequency synthesizer with quantization noise suppression techniques and a chopping differential charge pump. A level-shift-less phase frequency detector and a chopp
quantization noise is high, result in slow response times. Low levels of filtering, which are preferable when quantization noise is low, result in fast response times. Accordingly, RMS-to-DC conversion involves a trade-off between output signal accuracy (i.e., level of filtering) and response...
11. Because of the multi-bit quantization, the quantization noise PSD is quite small even nearby fS/2. In accordance with the previous analysis, the DC level in the 4-bit digital output is proportional to the RMS level of the RF input signal minus the total quantization noise power. A ...
Differential or Single-Ended Rail-to-Rail Common Mode Voltage Range Up to 1VPEAK Differential Voltage n Flexible Output: Rail-to-Rail Output Separate Output Reference Pin Allows Level Shifting n Wide Temperature Range: –55°C to 125°C n Small Size: Space Saving 8-Pin MSOP Package Typical ...
The example techniques may introduce less quantization noise and/or calculation error into processed data than conventional acceleration determination systems. The example techniques may generate more data from which to determine acceleration of an object than conventional acceleration determination systems. ...
Thus, V8 is proportional to VIN squared divided by VOUT, substantially without the quantization noise of reconfigurable ΔΣ stage 72. The quantization noise e2 of ΔΣ stage 76 remains, but the low frequency portion of that noise is further reduced by the spectral shaping provided by delay 78...
fed back to the negative input of the Δ-Σ modulator as a reference signal. When the reference input signal of a Δ-Σ modulator is taken into account, then the output of the modulator can be interpreted as a ratio-metric function plus quantization noise [U.S. Pat. No. 6,587,061 ...