Two-quadrant CMOS analogue divider

Dualibe, Carlos; Verleysen, Michel; Jespers, Paul

doi:10.1049/el:19980861

Cited by 20 publications

(10 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Since the circuit is derived from the divider the sources of mismatch are identical [6]. In order to ensure good matching properties for the transconductor the following design tips should be considered:…”

Section: Transconductor Circuitmentioning

confidence: 99%

New low-voltage electrically tunable triode-MOSFET transconductor and its application to low-frequency Gm-C filtering

Dualibe

Petrashin

Toledo

et al. 2005

Proceedings of the 18th Annual Symposium on Integrated Circuits and System Design - SBCCI '05

View full text Add to dashboard Cite

A new low-voltage electrically tunable transconductor is presented. Its transconductance can be settled by means of a ratio between a reference current and a reference voltage rendering the circuit independent of technological parameters, to a first order approach. This property allows, to some extent, reusing the transconductor in several CMOS processes. A kind of linear current division strategy turns also the transconductance inversely proportional to a product of two ratios between transistors' sizes that can be chosen so as to meet the desired Gm order of magnitude. This feature, together with a low-current biasing policy, is exploited in order to get a transconductance in the range of 1nS, as needed for very low-frequency filters. For a 2V supply and a 20pF load capacitor, an integrator characterization in a 1.6µm CMOS technology revealed a unity-gain frequency fT of 10Hz, a current consumption of 220nA and an input-referred noise of 2.2µVrms. Using this transconductor, a 10Hz third-order low-pass transconductance-capacitor (Gm-C) Butterworth filter was designed. It is intended for smoothing the output of a chopper amplifier. The filter shows acceptable performance in terms of die area (1.9mm 2 ) and power consumption (1µW), as desired for Low-Voltage Low-Power (LVLP) applications.

show abstract

Section: Transconductor Circuitmentioning

confidence: 99%

New low-voltage electrically tunable triode-MOSFET transconductor and its application to low-frequency Gm-C filtering

Dualibe

Petrashin

Toledo

et al. 2005

Proceedings of the 18th Annual Symposium on Integrated Circuits and System Design - SBCCI '05

View full text Add to dashboard Cite

show abstract

“…By other hand the higher the amount of digital systems which are created for the data acquisition and process control interface circuits also more internally using analog circuits to operate at a continuous rate as in the case of high speed dividers are required, emulators for real-time control, analog processors focused on the area of the image, signal generators, etc... [13] , [14], [15], [16], [17]. To design embedded circuits, designers must understand the basic principles of analog design.…”

Section: Introductionmentioning

confidence: 99%

New approximation for cosine wave mapping function to transistor level circuit

Reyes-Rosales

González-Díaz

Guerrero-Castellanos

2015

2015 International Conference on Electronics, Communications and Computers (CONIELECOMP)

View full text Add to dashboard Cite

The present paper deals with the design of an analog circuit that allows generating the mapping of the cosine function. This design is based on a novel approximation form using electrical parameters of a 90nm Complementary Metal-Oxide-Semiconductor (CMOS) process. The proposed approach has been compared with other reported schemes. Owing to simplicity, the proposed analog circuit is suitable for high frequency applications and where the power resources are limited. As an example, the application of this circuit in the solution of a nonlinear ordinary differential equation is presented. This equation represents the model of the vertical dynamics of a PVTOL (Planar Vertical Take-off and Landing) system. The main advantage with the analog solution for trigonometric functions is a continuous time response at high frequency and with no quantization error. 978-1-4799-7436-8/15/$31.00 ©2015 IEEE 978-1-4799-7436-8/15/$31.00 ©2015 IEEE 978-1-4799-7436-8/15/$31.00 ©2015 IEEE

show abstract

“…Analogue Divider: a novel current-input voltage-output divider [4] was specially designed to carry out the division operation in formula (1). The circuit is shown in figure 4 a).…”

Section: Consequents and Defuzzifiermentioning

confidence: 99%

“…While Vbl and Vbo are fixed bias voltages, transistor M3 gate voltage Vout is self-adjusted so that the drain current of M6 matches the current imposed by the PMOS cascoded-mirror branch M9, M12. In this way, the following relation holds [4]:…”

Section: Consequents and Defuzzifiermentioning

confidence: 99%

“…If some of the unwanted current-to-voltage and/or voltageto-current intermediate converters can be avoided, the delay through cascaded operators may be even shortened and higher speeds achieved. This is interesting when fuzzifiers 12, 31 and defuzzifiers [4] circuits are being designed €or these circuits interact normally with a voltage-mode controlled environment. On the other hand, to reduce die silicon area and power consumption some building blocks can be shared without altering functionality.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

On designing mixed-signal programmable fuzzy logic controllers as embedded subsystems in standard CMOS technologies

Dualibel

Jespers²,

Verleysen³

Symposium on Integrated Circuits and Systems Design

Self Cite

View full text Add to dashboard Cite

A digitallyprogrammable analogue Fuuy Logic Controller (FLC) is presented. Input and output signals are processed in the analog domain whereas the parameters of the controller are stored in a built-in digital memory. Some new functional blocks have been designed whereas others were improved towards the optimisation of the power consumption, the speed and the modularity while keeping a reasonable accuracy, as it is needed in several analogue signal processing applications. A nine-rules, two-inputs and one-output prototype was fabricated and successfully tested using a standard CMOS 2 . 4~ technology, showing good agreement with the expected performances, namely: from 2.22 to 5.26 M$ips (Mega fuzzy logic inferences per second) at the pin terminals (@ CL= 13pF). 933 pW power consumption per rule (@Vdd=SV) and 5 bits of resolution. Since the circuit is intended for a subsystem embedded in an application chip (@CL S 5 p F ) up to 8 Mflips may be expected.

show abstract

Two-quadrant CMOS analogue divider

Cited by 20 publications

References 2 publications

New low-voltage electrically tunable triode-MOSFET transconductor and its application to low-frequency Gm-C filtering

New low-voltage electrically tunable triode-MOSFET transconductor and its application to low-frequency Gm-C filtering

New approximation for cosine wave mapping function to transistor level circuit

On designing mixed-signal programmable fuzzy logic controllers as embedded subsystems in standard CMOS technologies

Contact Info

Product

Resources

About