Common-emitter Feedback Transimpedance Amplifier for Analog Optical Receivers

Kopa, Anthony; Apsel, Alyssa

doi:10.1109/iscas.2006.1693874

Cited by 6 publications

(8 citation statements)

References 2 publications

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“…Figure 2a shows a classic implementation of a TIA using an operational amplifier (OpAmp) and feedback resistor. Other implementations use various feedback-amplifier topologies to implement the same [9], [11], [12]. The operation can be in [9] with photodiode input and output integrator for chargereadout continuous mode with the sensor output always connected, as in the case of opto-receivers [12], or in sampled mode which requires a sampling switch and an integrator with reset at the output as depicted in Fig.…”

Section: B Transimpedance Amplifier For Charge Readoutmentioning

confidence: 99%

“…To address the issue DC current bias, the CEFB-TIA was proposed in [9]. The input node is driven by a commonemitter(source) transistor driven under negative feedback with another amplifier with positive gain as depicted in Fig.…”

Section: Common-emitter Feedbackmentioning

confidence: 99%

“…He is also associated with IMEC Leuven (email: wim.dehaene@esat.kuleuven.be) implicit integrator stage to implement the charge-integratingamplifier. In contrast to typical solutions [8], [9], the presented design decouples the sensor biasing from the TIA core. The integrator stage is implicitly included within the TIA by implementing a current-mirror output ,greatly simplyfing the design.…”

Section: Introductionmentioning

confidence: 99%

“…The basic TIA architecture is presented in Section III, considering its few limitations. Additionally, the common-emitter feedback transimpedance amplifier (CEFB-TIA) [9] and inverter based TIA [11], [12] are discussed that address some of the issues and form the basis of presented design. The main circuit is described in detail in Section IV with first an overview of the current mirror output in Section IV-A.…”

Section: Introductionmentioning

confidence: 99%

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An All LTPS-TFT-Based Charge-Integrating Amplifier for Sensor-Array Readout Circuit on Flexible Substrate

Dandekar

Myny

Dehaene

2022

IEEE Open J. Solid-State Circuits Soc.

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This paper presents the design of a readout circuit for charge-output sensor arrays integrated on flexible substrate. The Charge-Integrating-Amplifier is built with a current-output transimpedance amplifier that includes integrator function with reset. The Charge-Integrating-Amplifier has a fully differential internal topology, improving over single ended design, including the feedback amplifier implemented specifically as a Nauta-transconductor. The readout circuit has been manufactured in a 3µm LTPS process on foil and measured, achieving a bandwidth of 200kHz, operation at a 5V supply while consuming 586µW power and maintaining a maximum INL of 5%.

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Section: B Transimpedance Amplifier For Charge Readoutmentioning

confidence: 99%

Section: Common-emitter Feedbackmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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An All LTPS-TFT-Based Charge-Integrating Amplifier for Sensor-Array Readout Circuit on Flexible Substrate

Dandekar

Myny

Dehaene

2022

IEEE Open J. Solid-State Circuits Soc.

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“…A 40dBc third-order intermodulation (IM3) was obtained using HSPICE. Reference [4] showed analytically that there are significant benefits in linearity when choosing commonemitter feedback (CEFB) over traditional resistive feedback. CEFB has an output third-order intercept point of 23 dBm.…”

mentioning

confidence: 99%

Optical receiver for multicarrier modulation in short-reach communication

Atef

Swoboda²,

Zimmermann

2010

Electron. Lett.

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A high-linearity optical receiver with background-light-AGC for high PAPR signals is presented. The integrated BiCMOS optical receiver consists of a TIA with AGC, a linear amplifier and a line driver. The receiver THD is 1.7% and the third-order intermodulation is 50 dBc at 20 MHz and at an input optical power of 23.5 dBm. The thirdorder intermodulation decreases to 40 dBc at 100 MHz.Introduction: Short-range optical data transmission is attracting increasing interest in industry automation, in-car communication, and home networking. Polymer optical fibre (POF) represents an alternative to silica fibre for short-range communication and offers particular advantages. However, owing to its large numerical aperture of 0.5 and large core diameter the bandwidth of SI-POF is limited to 50 MHz/ 100 m. By use of multicarrier modulation schemes like OFDM such bandwidth limitations can be overcome. OFDM is seen as a promising technology for low-cost gigabit transmission over SI-POF [1].A major problem of OFDM is that the multicarrier signals usually have large envelope fluctuation. This means that the peak-to-average power ratio (PAPR) of multicarrier signals can be high. These large peaks increase the amount of intermodulation distortion (IMD), resulting in an increase in error rate.A high-linearity receiver with AGC is required for OFDM to reduce IMD. AGC adjusts the gain of the amplifiers to obtain the desired output signal strength. In conventional AGCs the signal amplitude is typically estimated using a peak detector. This adequately works for signal amplitudes with fixed PAPR such as sinusoids, but is unreliable for high-PAPR signals. These issues excluded the use of a conventional AGC with OFDM [2]. The wireless local area network receiver presented in [2] implemented an AGC, which uses RMS detection. This was found to be adequate for estimating the OFDM amplitude by integrating the duration of a training symbol.In this Letter we present an integrated linear optical receiver consisting of a TIA with AGC followed by an amplifier and a line driver. Additionally two main control loops are present, one for backgroundlight (BGL) cancellation and one for the gain control. The speciality of this linear optical receiver is that the gain is only controlled by BGL, which is always present in optical transmission systems owing to laser diode biasing above the threshold (limited extinction ratio). The presented BGL-AGC can achieve better linearity than peak-detecting AGC especially for pulsed signals or more general signals with high PAPR where the pulse repetition rate is low. When peak detection is used with this kind of signals, large storage capacitors would be necessary to store the peak value. Additionally, large capacitors cannot easily be charged very quickly and accurately. We do not need these large capacitors with the BGL-AGC.Nearly all previous attempts to design a linear optical receiver for short-range communication include only simulation results. No measurements have been presented to verify the optical receiver ...

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Examples of Optoelectronic Integrated Circuits

Zimmermann

2009

Springer Series in Optical Sciences

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Common-emitter Feedback Transimpedance Amplifier for Analog Optical Receivers

Cited by 6 publications

References 2 publications

An All LTPS-TFT-Based Charge-Integrating Amplifier for Sensor-Array Readout Circuit on Flexible Substrate

An All LTPS-TFT-Based Charge-Integrating Amplifier for Sensor-Array Readout Circuit on Flexible Substrate

Optical receiver for multicarrier modulation in short-reach communication

Examples of Optoelectronic Integrated Circuits

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