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Subject: search.filters.subject.Analog integrated circuit

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    Simple BiCMOS voltage differencing inverting buffered amplifier (VDIBA) realization and application
    (2014-01-01)
    Pukkalanun, Tattaya
    ;
    Tangsrirat, Worapong
    This work describes an integrable circuit technique to implement the recently defined active circuit block, namely a voltage differencing inverting buffered amplifier (VDIBA), suitable for integration in BiCMOS technology. The proposed VDIBA is composed of the differential-input transconductance amplifier as an input stage, and the unity-gain inverting voltage amplifier as an output stage. The circuit has been designed using bipolar and MOS transistors, in order to achieve the advantages of the both technologies. The performances of the realized VDIBA element are analyzed and discussed in detail. Simulation results with 0.35μm BiCMOS real process parameters verify the expected performance of the proposed circuit. As an application example, the proposed VDBA is employed to realize a canonical and resistorless first-order allpass filter.
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    An ultra-low-power digitally programmable gain amplifier for biological applications
    (2013-01-01)
    Kumngern, Montree
    ;
    Torteanchai, Usa
    This paper presents an ultra-low-power digitally programmable gain amplifier for biological signal processing applications. To achieve low-power consumption, the MOS transistor operating in weak inversion region is used. The circuit is constituted by a class-AB current amplifier which can handle wide input signal. The gain of digitally programmable gain amplifier can be maintained by using digital signal levels. The proposed circuit is simulated using 0.5 μm CMOS process from MOSIS. The proposed circuit consumes 44.3 nW from ±1.2 V power supply. The programmable gain varies linearity from 0 to 16 dB through a 3-bit digital signal while achieves the total harmonic distortion -36.7 dB. © 2013 IEEE.
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    A modified bipolar translinear cell with improved linear range and its applications
    (2012-12-28)
    Merz, Naruemo
    ;
    Kiranon, Wiwat
    ;
    Wongtachathum, Chariya
    ;
    Pawarangkoon, Prajuab
    ;
    Narksarp, Wipavan
    This paper presents a technique to extend the linear input voltage range of a sinh mixed translinear cell proposed by Fabre [1]. This technique extends the linear operation range of the circuit by inserting common-anodeconnected pairs into the mixed translinear cell. Then the relationship between the output current and the input voltage is developed to be linear. The transconductance gain can be adjusted electronically while keeping its linearity. The performance of the proposed circuit is verified by mathematical analysis and by SPICE simulations. Finally, applications of the proposed cell in a floating resistor and a CCCII for designing an instrumentation amplifier are presented.