A CMOS optical preamplifier for wireless infrared communications

Phang, K.; Johns, D.A.

doi:10.1109/82.775380

Cited by 69 publications

(2 citation statements)

References 15 publications

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“…If the fixed-gain voltage amplifier did not exist, large transimpedances could be achieved with large enough variablegains A var = 1 ? R 3 /R VCR2 , (1). However, in this case frequency bandwidth would be affected due to the pole x p2 (3).…”

Section: Basic Approachmentioning

confidence: 90%

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A 122 TΩ Hz transimpedance bandwidth product BiCMOS optical sensor front-end with a 54.7 dB voltage-controlled photo-sensitivity range

Tadic

Marchlewski

Zimmermann

2008

Analog Integr Circ Sig Process

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An optical sensor front-end with integrated PIN photodiode in 0.6 lm BiCMOS technology intended for universal optical storage operation is presented. It is based on a mixed current conveyor and voltage amplifiers topology avoiding stability problems. The transimpedance is continuously variable and directly proportional to a voltagecontrolled resistance. Another voltage-controlled resistor within a variable-gain voltage amplifier increases the photosensitivity range. A fixed-gain voltage amplifier and a current biasing of the current conveyor enable frequency bandwidth enhancement leading to a large transimpedance bandwidth product. A linearity error smaller than 2.8%, a photo-sensitivity range of 541 (54.7 dB) with the largest photo-sensitivity of 2468 mV/lW, an offset voltage \13.7 mV, a frequency bandwidth up to 277 MHz, a slew rate up to 377 V/ls, a transimpedance bandwidth product up to 122 TX Hz, and a maximum power consumption of \4.3 mW are achieved.

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Section: Basic Approachmentioning

confidence: 90%

“…They can be divided into three groups. The first type of variable-gain OEICs is that with discrete variable transimpedances based on switching techniques [1][2][3]. Carefully calculated compensation capacitors must be added in parallel with feedback resistors in order to avoid stability problems in these OEICs.…”

Section: Introductionmentioning

confidence: 99%