A current‐mode automatic frequency tuning system for filters with current mirrors

Souliotis, George

doi:10.1002/cta.589

Cited by 5 publications

(4 citation statements)

References 24 publications

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“…Many design considerations and applications of the VTC can be found in [26][27][28]. The schematic of the VTC is shown in Figure 10.…”

Section: Multi-band Voltage Controlled Delay Unit (Mvcdu)mentioning

confidence: 99%

“…The VTC circuit ensures a near-linear bias current because current-controlled delay elements are known to be less sensitive to supply voltage variation, thereby achieving better frequency response and accuracy in low voltage applications [25]. Many design considerations and applications of the VTC can be found in [26][27][28]. The schematic of the VTC is shown in Figure 10.…”

Section: Multi-band Voltage Controlled Delay Unit (Mvcdu)mentioning

confidence: 99%

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A 120–420 MHz delay‐locked loop with multi‐band voltage‐controlled delay unit

Kuo

Hsu

2012

Circuit Theory & Apps

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SUMMARYA low-jitter and low-power dissipation delay-locked loop (DLL) is presented. A proposed multi-band voltage control delay unit (MVCDU) is employed to extend the operation frequency of the DLL by controlling the delay cell within the MVCDU. The jitter of DLL is reduced due to MVCDU's low sensitivity. The delay cell in the MVCDU employs a differential configuration to further reduce the noise impact from the fluctuation in the supply and ground voltage. The operating frequency of the proposed DLL ranges from 120 to 420 MHz. The proposed design has been fabricated in a TSMC 0.18 m CMOS process. The measured RMS and peak-to-peak jitters are 4.86 and 34.55 ps, respectively, at an operating frequency of 300 MHz. The power dissipation is below 14.85 mW at an operating frequency of 420 MHz.

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“…Many design considerations and applications of the VTC can be found in [26][27][28]. The schematic of the VTC is shown in Figure 10.…”

Section: Multi-band Voltage Controlled Delay Unit (Mvcdu)mentioning

confidence: 99%

Section: Multi-band Voltage Controlled Delay Unit (Mvcdu)mentioning

confidence: 99%

A 120–420 MHz delay‐locked loop with multi‐band voltage‐controlled delay unit

Kuo

Hsu

2012

Circuit Theory & Apps

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“…The synthesis of analog circuit based on current-mode technique has been gained significant attention, because current-mode circuit offers certain advantages such as greater linearity, simple structure, better accuracy, higherfrequency operation and larger dynamic range compared with op-amps-based circuits [2]- [3]. To make the current mode circuit cascading without the use of any additional buffer, the input impedance should be low and the output impedance should be high.…”

Section: Introductionmentioning

confidence: 99%

Temperature Insensitive Current-Mode Four Quadrant Multiplier Using Single CFCTA

2017

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A four quadrant multiplier of two current input signals using active building block, namely current follower cascaded transconductance amplifier (CFCTA) is presented in this paper. The proposed multiplier consists of only single CFCTA without the use of any passive element. The presented circuit has low impedance at current input node and high impedance at current output node which is convenient for cascading in current mode circuit without the need of current buffer circuits. The output current can multiply two input currents with temperature insensitivity. Moreover, the magnitude of output current can be controlled electronically via DC bias current. With only single active building block, the presented multiplier is suitable for integrated circuit implementation for analog signal processing. Simulation results from a PSpice program are presented in order to demonstrate the multiplier proposed here.

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“…Continuous transconductance tuning is often required to achieve programmable filter characteristics and/or to compensate for process, temperature and aging variations using automatic tuning techniques . Unfortunately, continuous tuning of the resistance value is not possible with a passive resistor.…”

Section: Introductionmentioning

confidence: 99%

Highly linear wide‐swing continuous tuning of CMOS transconductors

Algueta

Lopez-Martin

Ramírez-Angulo

et al. 2013

Circuit Theory & Apps

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SUMMARY A technique to improve the input and output range of CMOS transconductors with resistive current division for continuous tuning is presented. Using it, a tunable transconductor is proposed which features high linearity over a wide input range and simplicity. Measurement results of the transconductor, fabricated in a 0.5 µm CMOS process, show an IM3 of −66 dB for a ±1.65 V supply and two input tones centered at 1 MHz of 1 Vpp each, and only 0.7 mW of power consumption. This represents an improvement of 13 dB versus the same transconductor using conventional current division. Copyright © 2013 John Wiley & Sons, Ltd.

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A current‐mode automatic frequency tuning system for filters with current mirrors

Cited by 5 publications

References 24 publications

A 120–420 MHz delay‐locked loop with multi‐band voltage‐controlled delay unit

A 120–420 MHz delay‐locked loop with multi‐band voltage‐controlled delay unit

Temperature Insensitive Current-Mode Four Quadrant Multiplier Using Single CFCTA

Highly linear wide‐swing continuous tuning of CMOS transconductors

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