All current-mode frequency selective circuits

1989 ◽  
Vol 25 (12) ◽  
pp. 759 ◽  
Author(s):  
G.W. Roberts ◽  
A.S. Sedra
Keyword(s):  
Current Mode ◽  
Mode Frequency ◽  
Frequency Selective

scholarly journals Design of area-efficient GHz range current mode frequency synthesizer using standard CMOS technology

2019 ◽  
Vol 70 (4) ◽  
pp. 323-328
Author(s):  
Dan-Dan Zheng ◽  
Yu-Bin Li ◽  
Chang-Qi Wang ◽  
Kai Huang ◽  
Xiao-Peng Yu
Keyword(s):  
Frequency Synthesizer ◽  
Frequency Tuning ◽  
Supply Voltage ◽  
Current Mode ◽  
Cmos Technology ◽  
Mode Frequency ◽  
Loop Filter ◽  
Silicon Area ◽  
Power Efficient ◽  
A Current

Abstract In this paper, an area and power efficient current mode frequency synthesizer for system-on-chip (SoC) is proposed. A current-mode transformer loop filter suitable for low supply voltage is implemented to remove the need of a large capacitor in the loop filter, and a current controlled oscillator with additional voltage based frequency tuning mechanism is designed with an active inductor. The proposed design is further integrated with a fully programmable frequency divider to maintain a good balance among output frequency operating range, power consumption as well as silicon area. A test chip is implemented in a standard 0.13 µm CMOS technology, measurement result demonstrates that the proposed design has a working range from 916 MHz to 1.1 l GHz and occupies a silicon area of 0.25 mm2 while consuming 8.4 mW from a 1.2 V supply.

First-Order Current-Mode Fully Cascadable All-Pass Frequency Selective Structure, Its Higher-Order Extension and Tunable Transformation Possibilities

2021 ◽  
pp. 2250030
Author(s):  
Bhartendu Chaturvedi ◽  
Jitendra Mohan ◽  
Jitender
Keyword(s):  
Current Mode ◽  
Matching Condition ◽  
Quality Performance ◽  
Passive Components ◽  
First Order ◽  
Component Matching ◽  
Frequency Selective ◽  
High Output Impedance ◽  
Theoretical Analyses ◽  
High Output

An extra-X second-generation current conveyor (EXCCII) based first-order current-mode all-pass frequency selective structure is presented through this paper. A grounded resistor and a grounded capacitor are used as passive components. Single active element based realization directly correlates with the circuit’s simplicity. The grounded nature of passive components is advantageous from IC fabrication aspects. The proposed circuit offers cascadability support through low input impedance and high output impedance. The ability of the presented idea to deliver the desired output without meeting any stringent component matching condition further simplifies the circuit’s operation. Sensitivity performance of the proposed circuit is good. The quality performance at high frequency is another value addition to the circuit’s signal processing attributes. Analyses showing the circuit’s behavior under non-ideal conditions are also described in detail. Validation of theoretical analyses is supported by simulations carried out on PSPICE at 0.25[Formula: see text][Formula: see text]m technology.

A 90nm PVT Tolerant Current Mode Frequency Divider with Wide Locking Range

2020 ◽  
Author(s):  
Madhusudan Maiti ◽  
Shubhro Chakrabartty ◽  
AlaaDdin Al-Shidaifat ◽  
Hanjung Song ◽  
Bidyut K Bhattacharyya ◽  
...  
Keyword(s):  
Current Mode ◽  
Mode Frequency ◽  
Frequency Divider ◽  
Locking Range ◽  
Wide Locking Range
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