18.1 A -105dBc THD+N (-114dBc HD2) at 2.8V&lt;inf&gt;PP&lt;/inf&gt; Swing and 120dB DR Audio Decoder with Sample-and-Hold Noise Filtering and Poly Resistor Linearization Schemes

Wen, Shon-Hang; Chen, Kuan-Dar; Hsiao, Chuan-Hung; Chen, Ya-Chi

doi:10.1109/isscc.2019.8662456

Cited by 5 publications

(2 citation statements)

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“…S AMPLED voltage references [1]- [4] (Fig. 1) can achieve low-power operation by storing the output of a conventional voltage reference on a hold capacitor (C H ).…”

Section: Introductionmentioning

confidence: 99%

“…Since the power dissipation of a buffer will typically be lower than that of a voltage reference for the same noise level, this approach delivers significant power savings. This is especially true of band-gap voltage references, which are generally not very noise efficient, because their output voltage is generated by amplifying the difference between two base-emitter voltages V BE , together with the associated noise, and adding it to a base-emitter voltage V BE [1]- [4].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

An Auto-Zero-Stabilized Voltage Buffer With a Quiet Chopping Scheme and Constant Sub-pA Input Current

Rooijers

Huijsing

Makinwa

2022

IEEE J. Solid-State Circuits

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This article describes an auto-zero stabilized voltage buffer that achieves low offset and low noise with sub-pA input current. A high gain stabilization loop is used to periodically cancel the buffer's offset. The loop itself is periodically disconnected from the buffer and auto-zeroed, during which its bandwidth is reduced to reduce the associated noise folding. However, this also reduces its offset correction range, and so to avoid overloading, its initial offset is digitally trimmed. To break up the correlation between the residual low-frequency (LF) noise of the auto-zero and stabilization phases, the loop is periodically chopped, which significantly reduces the buffer's LF noise. Finally, the duty-cycle of the two phases is optimized to bring the buffer's LF noise density close to √ 2 times its white noise density (14 nV/ √ Hz), which is the fundamental limit of an AZ amplifier. The buffer also achieves a constant and low input current (0.8 pA), as well as a state-of-the-art offset (0.4 µV).

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“…S AMPLED voltage references [1]- [4] (Fig. 1) can achieve low-power operation by storing the output of a conventional voltage reference on a hold capacitor (C H ).…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%