As the front-end preamplifiers in optical receivers, transimpedance amplifiers （TIAs） are commonly required to have a high gain and low input noise to amplify the weak and susceptible input signal. At the same time,...As the front-end preamplifiers in optical receivers, transimpedance amplifiers （TIAs） are commonly required to have a high gain and low input noise to amplify the weak and susceptible input signal. At the same time, the TIAs should possess a wide dynamic range （DR） to prevent the circuit from becoming saturated by high input currents. Based on the above, this paper presents a CMOS transimpedance amplifier with high gain and a wide DR for 2.5 Gbit/s communications. The TIA proposed consists of a three-stage cascade pull push inverter, an automatic gain control circuit, and a shunt transistor controlled by the resistive divider. The inductive-series peaking technique is used to further extend the bandwidth. The TIA proposed displays a maximum transimpedance gain of 88.3 dBΩ with the -3 dB bandwidth of 1.8 GHz, exhibits an input current dynamic range from 100 nA to 10 mA. The output voltage noise is less than 48.23 nV/√Hz within the -3 dB bandwidth. The circuit is fabricated using an SMIC 0.18 μm 1P6M RFCMOS process and dissipates a dc power of 9.4 mW with 1.8 V supply voltage.展开更多
为了简化感应电能传输(inductive power transfer,IPT)电池充电系统原边与副边电路的设计和控制复杂性,该文提出通过在原边电路加入一个附加电容和一个半导体开关的方法实现对电池恒流恒压切换充电,无需调节逆变器直流输入电压、原边移...为了简化感应电能传输(inductive power transfer,IPT)电池充电系统原边与副边电路的设计和控制复杂性,该文提出通过在原边电路加入一个附加电容和一个半导体开关的方法实现对电池恒流恒压切换充电,无需调节逆变器直流输入电压、原边移相控制及副边加入调压电路。恒流模式时,配置的补偿电容完全补偿原边线圈;恒压模式时,只需一个开关切出或者切入附加电容。该方法只需简单的通信(用于充电模式切换),没有复杂的控制策略,结构简单,成本低。实验表明,所提出方法输出的恒流和恒压随着电池等效负载电阻改变而轻微变化,但结果仍然满足电池充电要求。展开更多
在感应式无线电能传输系统的实际应用中,通常需要系统输出电压保持恒定。采用一种基于串并/串(SP/S)谐振补偿的感应式无线电能传输系统拓扑结构,当系统发射端和接收端的相对位置确定并采用定频控制时,该结构在全负载范围内具备接收端输...在感应式无线电能传输系统的实际应用中,通常需要系统输出电压保持恒定。采用一种基于串并/串(SP/S)谐振补偿的感应式无线电能传输系统拓扑结构,当系统发射端和接收端的相对位置确定并采用定频控制时,该结构在全负载范围内具备接收端输出恒压特性。同时分析了随着横向偏移的变化,系统输出恒压增益的变化特性。最后,设计了一个6.6 k W、20 k Hz定频控制的感应式无线电能传输实验系统,验证了所采用的SP/S谐振补偿拓扑结构的可行性和有效性。展开更多
This paper presents a modified regulated cascode （RGC） transimpedance amplifier （TIA） with a novel pre-equalized technique. The pre-equalized circuit employed the broadband series inductive Jr-network and Gin- boo...This paper presents a modified regulated cascode （RGC） transimpedance amplifier （TIA） with a novel pre-equalized technique. The pre-equalized circuit employed the broadband series inductive Jr-network and Gin- boosting technique. The introduction of this technique compensates the transferred signal at the input port of the TIA without an increase in power dissipation. Furthermore, a novel miller capacitance degeneration method is designed in the gain stage for further bandwidth improvement. The TIA is realized in UMC 0.18 μm CMOS technology and tested with an on-chip 0.3 pF capacitor to emulate a photodetector （PD）. The measured transimpedance gain amounts to 57 dBf2 with a -3 dB bandwidth of about 8.2 GHz and consumes only 22 mW power from a single 1.8 V supply.展开更多
基金supported by the National Natural Science Foundation of China(Nos.61376033,61006028)the National High-Tech Program of China(Nos.2012AA012302,2013AA014103)the Opening Project of Science and Technology on Reliability Physics and Application Technology of Electronic Component Laboratory
文摘As the front-end preamplifiers in optical receivers, transimpedance amplifiers （TIAs） are commonly required to have a high gain and low input noise to amplify the weak and susceptible input signal. At the same time, the TIAs should possess a wide dynamic range （DR） to prevent the circuit from becoming saturated by high input currents. Based on the above, this paper presents a CMOS transimpedance amplifier with high gain and a wide DR for 2.5 Gbit/s communications. The TIA proposed consists of a three-stage cascade pull push inverter, an automatic gain control circuit, and a shunt transistor controlled by the resistive divider. The inductive-series peaking technique is used to further extend the bandwidth. The TIA proposed displays a maximum transimpedance gain of 88.3 dBΩ with the -3 dB bandwidth of 1.8 GHz, exhibits an input current dynamic range from 100 nA to 10 mA. The output voltage noise is less than 48.23 nV/√Hz within the -3 dB bandwidth. The circuit is fabricated using an SMIC 0.18 μm 1P6M RFCMOS process and dissipates a dc power of 9.4 mW with 1.8 V supply voltage.
文摘为了简化感应电能传输(inductive power transfer,IPT)电池充电系统原边与副边电路的设计和控制复杂性,该文提出通过在原边电路加入一个附加电容和一个半导体开关的方法实现对电池恒流恒压切换充电,无需调节逆变器直流输入电压、原边移相控制及副边加入调压电路。恒流模式时,配置的补偿电容完全补偿原边线圈;恒压模式时,只需一个开关切出或者切入附加电容。该方法只需简单的通信(用于充电模式切换),没有复杂的控制策略,结构简单,成本低。实验表明,所提出方法输出的恒流和恒压随着电池等效负载电阻改变而轻微变化,但结果仍然满足电池充电要求。
文摘在感应式无线电能传输系统的实际应用中,通常需要系统输出电压保持恒定。采用一种基于串并/串(SP/S)谐振补偿的感应式无线电能传输系统拓扑结构,当系统发射端和接收端的相对位置确定并采用定频控制时,该结构在全负载范围内具备接收端输出恒压特性。同时分析了随着横向偏移的变化,系统输出恒压增益的变化特性。最后,设计了一个6.6 k W、20 k Hz定频控制的感应式无线电能传输实验系统,验证了所采用的SP/S谐振补偿拓扑结构的可行性和有效性。
基金Project supported by the National Natural Science Foundation of China(Nos.61036002,61474081)
文摘This paper presents a modified regulated cascode （RGC） transimpedance amplifier （TIA） with a novel pre-equalized technique. The pre-equalized circuit employed the broadband series inductive Jr-network and Gin- boosting technique. The introduction of this technique compensates the transferred signal at the input port of the TIA without an increase in power dissipation. Furthermore, a novel miller capacitance degeneration method is designed in the gain stage for further bandwidth improvement. The TIA is realized in UMC 0.18 μm CMOS technology and tested with an on-chip 0.3 pF capacitor to emulate a photodetector （PD）. The measured transimpedance gain amounts to 57 dBf2 with a -3 dB bandwidth of about 8.2 GHz and consumes only 22 mW power from a single 1.8 V supply.
