Analysis and Compensation of Log-Domain Biquadratic Filter Response Deviations due to Transistor Nonidealities

2000 ◽  
pp. 41-56
Author(s):  
Vincent W. Leung ◽  
Gordon W. Roberts
Keyword(s):  
Biquadratic Filter ◽  
Log Domain ◽  
Filter Response

scholarly journals Voltage-Mode Universal Biquadratic Filter Using Two OTAs

2004 ◽  
Vol 27 (2) ◽  
pp. 85-89 ◽  
Author(s):  
Jiun-Wei Horng
Keyword(s):  
High Input ◽  
High Input Impedance ◽  
Passive Components ◽  
Operational Transconductance Amplifiers ◽  
Voltage Mode ◽  
Biquadratic Filter ◽  
Minimum Number ◽  
Transconductance Amplifiers ◽  
Output Filter ◽  
Filter Response

A four-inputs and two-outputs voltage-mode universal biquadratic filter using only two operational transconductance amplifiers (OTAs) and two capacitors is presented. The new circuits offer several advantages, such as employing the minimum number of active and passive components (two OTAs and two capacitors); the versatility to synthesize highpass, bandpass, lowpass, notch and allpass responses; high input impedance and employing only grounded capacitors for bandpass and lowpass filter realizations; some derived filter types enjoy the availability of one more simultaneously output filter response and good sensitivities performance

State-space synthesis of log-domain oscillators

1995 ◽  
Vol 31 (21) ◽  
pp. 1797-1799 ◽  
Author(s):  
A. Thanachayanont ◽  
C. Toumazou ◽  
S. Pookaiyaudom
Keyword(s):  
State Space ◽  
Log Domain

scholarly journals Voltage-Mode Universal Biquadratic Filter Using Single DVCC

2013 ◽  
Vol 2013 ◽  
pp. 1-5 ◽  
Author(s):  
Jiun-Wei Horng ◽  
Zih-Yang Jhao
Keyword(s):  
Current Conveyor ◽  
Circuit Topology ◽  
Voltage Mode ◽  
Allpass Filters ◽  
Differential Voltage ◽  
Biquadratic Filter ◽  
Differential Voltage Current Conveyor ◽  
Output Filter

A voltage-mode universal biquadratic filter using a differential voltage current conveyor (DVCC), two capacitors, and two resistors is presented. The proposed circuit has four input terminals and three output terminals and can realize all the standard filter functions, which are lowpass, bandpass, highpass, notch, and allpass filters, without changing the circuit topology. Three simultaneous output filter responses can be obtained from some derived filter types. The proposed circuit employs only one DVCC that simplifies the configuration.

Dielectric-loaded L-band filters for high-power space applications

2021 ◽  
pp. 1-11
Author(s):  
Paolo Vallerotonda ◽  
Fabrizio Cacciamani ◽  
Luca Pelliccia ◽  
Alessandro Cazzorla ◽  
Davide Tiradossi ◽  
...  
Keyword(s):  
High Power ◽  
Dielectric Resonators ◽  
Q Factor ◽  
Rf Power ◽  
Space Applications ◽  
High Q ◽  
Critical Issues ◽  
L Band ◽  
Multipactor Discharge ◽  
Filter Response

Abstract The design and first experimental results of Tx and Rx L-band bandpass filters for a high-power satellite diplexer are presented in this paper. Designed in the framework of an ESA ARTES AT project, the filters are based on TM010 mode dielectric resonators. These resonators allow for better results in terms of volume occupation with respect to other dielectric resonators still maintaining high Q-factor values (>2000). Volume saving above 30% is achieved with respect to standard coaxial filters. The filter geometries and materials have been chosen in order to improve the power-handling and to cope with related critical issues for space applications (i.e. avoid any multipactor discharge in the operating RF power range and low-PIM response). Measurements of Tx filter show good correlation with the design in terms of central frequency, BW, and unloaded Q-factor (almost 3000). Measurements of Rx filter show a worse correlation with the design in terms of filter response shape. This is ascribed to size tolerances of one of the filter resonators. Multiple analyses are ongoing to remove this degradation in the final engineering model.

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