No. 24 Research Institute of China Electronics Technology Group Corporation

Chongqing Gigachip Technology Co. Ltd.

Congqing Gigachip Technology Co., Ltd.

Zhou Yu

Dongbing Fu

Guangbing Chen

Jian'an Wang

Yuxin Wang

Daiguo Xu

Zhengping Zhang

Can Zhu

Ruzhang Li

Xueliang Xu

Jun Luo

Tao Liu

Yan Wang

Jianan Wang

Lu Liu

Xu Wang

Rongbin Hu

Minming Deng

Zicheng Xu

Shengdong Hu

Zhimei Yang

Min Gong

A differential-follower control circuit has been provided, comprising: a follower; an output-voltage following module, which controls a voltage at a control terminal of the follower to vary with an output voltage; a substrate-voltage following module, which controls a substrate voltage of an output transistor of the follower to vary with an input voltage; an output terminal of the follower is connected to a first terminal of the output-voltage following module; a second terminal of the output-voltage following module is connected to the control terminal of the follower; a first terminal of the substrate-voltage following module is connected to an input terminal of the follower and a second terminal of the substrate-voltage following module is connected to a substrate of the output transistor; the invention effectively improves the overall linearity of the follower.

Differential-follower control circuit

The present disclosure provides a polysilicon resistor, a method for manufacturing the same, and a successive approximation register analog-to-digital converter. A polysilicon resistor includes a first silicon substrate; a first silicon oxide layer disposed on the first silicon substrate; a second silicon substrate disposed on the first silicon oxide layer, wherein an insulating isolation structure extends through the second silicon substrate and divides the second silicon substrate into a plurality of substrate isolation areas separated from each other; a second silicon oxide layer disposed on the second silicon substrate; and a polysilicon resistor layer disposed on the second silicon oxide layer, wherein the polysilicon resistor layer includes a plurality of polysilicon resistor blocks separated from each other, the plurality of polysilicon resistor blocks is arranged in one-to-one correspondence with the plurality of substrate isolation areas, and the plurality of polysilicon resistor blocks are connected in series.

Polysilicon resistors, methods for manufacturing the same, and successive approximation register analog-to-digital converter

A follow-hold switch circuit comprising: a follower; a sampling sub-circuit for voltage sampling; a bootstrap-control sub-circuit, which provides a bootstrap voltage to the sampling sub-circuit when the circuit is in a following state; a sampling-switch-control sub-circuit, which provides a common-mode voltage to a bootstrap capacitor in the bootstrap-control sub-circuit when the circuit is in a holding state; the follower is connected to an output of the sampling sub-circuit; the sampling sub-circuit is connected to the bootstrap-control sub-circuit and the sampling-switch-control sub-circuit respectively through a sampling switch; the present disclosure can effectively improve the linearity of sampling switches.

Follow-hold switch circuit

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

Growing community of inventors

Chongqing, China

Zhou Yu