Producing 180° out-of-phase signals from a sinusoidal waveform input

Golnabi, H.; Ashrafi, Ashkan

doi:10.1109/19.481356

Cited by 14 publications

(11 citation statements)

References 2 publications

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“…15, the system phase error remained less than about 1 AE for frequencies up to 1 MHz for R G = 1 kX and R G = 220 X. This performance up to 1 MHz is superior to the circuit performances in Ref [5][6][7][8]. Fig.…”

Section: Experimental and Simulation Results Of The Proposed Cmbgmentioning

confidence: 95%

“…Amplitude response of (v o2 /v o1 ) when R G = 220 and 1K Ohm Simulation R G =220 and1K Ohm Table 1 shows a performance comparison between the proposed current-mode balanced generator circuits and the other circuitry that used to provide the same functions [5][6][7]. Balanced generator circuits proposed in Ref.…”

Section: δV(db)mentioning

confidence: 99%

“…Unlike the circuits in Ref. [5] and [6], this circuit does not require precise matching of amplifier poles. However, when this circuit, see Fig.…”

Section: Introductionmentioning

confidence: 95%

“…Also, due to the fixed gain bandwidth product of the operational amplifier, the system cannot simultaneously provide both a minimum phase-difference error between the outputs and minimum amplitude difference without compromising the bandwidth performance of the system. Additionally, VMBGs require precise resistor matching to achieve high common-mode rejection ratio (CMRR) [5,6].…”

Section: Introductionmentioning

confidence: 99%

“…1 and 2, require the matching of amplifier poles [5,6]. Also, due to the fixed gain bandwidth product of the operational amplifier, the system cannot simultaneously provide both a minimum phase-difference error between the outputs and minimum amplitude difference without compromising the bandwidth performance of the system.…”

Section: Introductionmentioning

confidence: 99%

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A new current mode implementation of a balanced-output-signal generator

Ghallab

Mostafa

Ismail

2014

Analog Integr Circ Sig Process

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This paper presents a new current mode implementation of a balanced-output-signal generator that utilizes an operational floating current conveyor (OFCC) as a basic building block. The OFCC, as a current-mode device, shows flexible properties with respect to other current or voltage-mode circuits. The advantages of the proposed current mode balanced-output-signal generator (CMBG) are threefold. Firstly, it offers an accurate phase and amplitude performance over a wide bandwidth without requiring matched resistors. Secondly, it has a differential input and it can provide either current or voltage outputs. Finally, the proposed CMBG circuit offers a significant improvement in accuracy compared to other CMBGs based on the current conveyor. The proposed CMBG has been analyzed, simulated and experimentally tested. The experimental results verify that the proposed CMBG outperforms existing CMBGs in terms of the number of basic building blocks used and accuracy.

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Section: Experimental and Simulation Results Of The Proposed Cmbgmentioning

confidence: 95%

Section: δV(db)mentioning

confidence: 99%

“…Unlike the circuits in Ref. [5] and [6], this circuit does not require precise matching of amplifier poles. However, when this circuit, see Fig.…”

Section: Introductionmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

A new current mode implementation of a balanced-output-signal generator

Ghallab

Mostafa

Ismail

2014

Analog Integr Circ Sig Process

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A high precision method for measuring very small capacitance changes

Ashrafi

Golnabi

1999

Review of Scientific Instruments

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A novel method for measuring very small capacitance changes based on capacitance-to-phase angle conversion is introduced in this article. This new method is the improved or linearized version of the nonlinear capacitance-to-phase angle conversion method. The main features of this scheme are the very good linearity, extremely high stray immunity and a very high resolution. The experimental results of the prototype version of this scheme have also been reported. By using this prototype and a simple capacitive transducer, a minimum detectable distance of about 16 nm can be achieved. This means that a capacitance change of about 0.7 fF (0.7ϫ10 Ϫ15 F) in a capacitance of 22 pF can be resolved, so the minimum resolvable relative capacitance is about 32 ppm. By the theory it can be seen that the minimum resolvable relative capacitance of 2 ppm could be achieved by this method.

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