No. 24 Research Institute of China Electronics Technology Group Corporation

Chongqing Gigachip Technology Co. Ltd.

Zicheng Xu

Dongbing Fu

Jian'an Wang

Guangbing Chen

Ting Li

Ruzhang Li

Yong Zhang

Yuxin Wang

Daiguo Xu

Yabo Ni

Zhengbo Huang

Jun Luo

Gangyi Hu

Tao Liu

Yan Wang

Hequan Jiang

Lu Liu

Xingfa Huang

Xu Wang

Minming Deng

Shiliu Xu

Zhou Yu

Shengdong Hu

Jun Yuan

The comparator includes an input unit, a load unit, a control switch, and an adjustment unit. The input ends of the input unit are connected to a first input signal and a second input signal. The load unit is connected to the input unit, and the gain of the comparator is adjusted by changing the gate voltages of the pair of gain adjustment transistors of the load unit. The adjustment unit is connected to the input unit, and the gate voltages of the pair of gain adjustment transistors are adjusted according to the enable state of the control switch. The present disclosure also provides an analog-to-digital converter.

Comparator and analog-to-digital converter

A multi-bit resolution sub-pipeline structure for measuring a jump magnitude of a transmission curve, comprising: a sub-analog-to-digital converter having n-bit resolution configured to quantize input analog voltage signals and output digital voltage signals; a sub-digital-to-analog converter having n-bit resolution configured to convert the digital voltage signals output by the sub-analog-to-digital converter into corresponding analog voltage signals; a decoder having n-bit resolution configured to decode an n-bit binary input signal; and a switched-capacitor amplification unit configured to, when in a normal mode, perform sampling and residue amplification on the input analog voltage signals; and when in a test mode, measure the jump magnitude of the transmission curve corresponding to each decision level. Magnitude measurement of a transmission curve is performed within 2clock periods, th and a measurement result is sent to a back-end digital domain of the A/D converter for correction.

Multi-bit resolution sub-pipeline structure for measuring jump magnitude of transmission curve

The present disclosure provides a substrate-enhanced comparator and electronic device, the comparator including: a cross-coupled latch, for connecting input signals to the gate of a cross-coupled MOS transistor to form a first input of the latch; output buffers, connected to the cross-coupled latch for amplifying output signals of the latch; AC couplers, connected to the output buffers for receiving and amplifying the output signals of the latch, coupling the output signals to substrates of the cross-coupled MOS transistors to form second inputs of the latch. The cross-coupled latch is also for output signal regenerative latching based on input signals sampled at the first inputs and input signals sampled at the second inputs. The present disclosure introduces additional substrate inputs to the cross-coupled structure of the conventional latch as the second inputs of the latch.

Substrate-enhanced comparator and electronic device

The present disclosure provides a buffer circuit and a buffer. The buffer circuit includes: an input follower circuit for following the voltage change of the first input signal; an input follower linearity boosting circuit for improving follower linearity of the input follower circuit; a first voltage bootstrap circuit for bootstrapping the voltage of the first input signal; a second voltage bootstrap circuit for bootstrapping the voltage of the second input signal; a third voltage bootstrap circuit for providing corresponding quiescent operation point voltage; a compensation follower circuit for following the compensation voltage; a compensation follower linearity boosting circuit for improving follower linearity of the compensation follower circuit; a first load for collecting the buffered voltage; a bias circuit for providing a bias current for the buffer; a bias linearity boosting circuit for improving linearity of the bias circuit; a second load for generating a nonlinear compensation current.

Buffer circuit and buffer

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Sichuan, China

Zicheng Xu