scholarly journals The Design of a Charge Pump Circuit and System with Input Impedance Modulation for a Flexible-Type Thermoelectric Generator with High-Output Impedance

Electronics ◽  
2021 ◽  
Vol 10 (10) ◽  
pp. 1212
Author(s):  
Kazuma Koketsu ◽  
Toru Tanzawa
Keyword(s):  
Input Impedance ◽  
Thermoelectric Generator ◽  
Charge Pump ◽  
Operating Voltage ◽  
Output Impedance ◽  
Two Phase ◽  
Pump System ◽  
High Output Impedance ◽  
A Charge ◽  
High Output

This paper describes a charge pump system for a flexible thermoelectric generator (TEG). Even though the TEG has high-output impedance, the system controls the input voltage to keep it higher than the minimum operating voltage by modulating the input impedance of the charge pump using two-phase operation with low- and high-input impedance modes. The average input impedance can be matched with the output impedance of the TEG. How the system can be designed is also described in detail. A design demonstration was performed for the TEG with 400 Ω. The fabricated system was also measured with a flexible-type TEG based on carbon nanotubes. Even with an output impedance of 1.4 kΩ, the system converted thermal energy into electric power of 30 μW at 2.5 V to the following sensor ICs.

A very-high output impedance charge pump for low-voltage low-power PLLs

2009 ◽  
Vol 40 (6) ◽  
pp. 1026-1031 ◽  
Author(s):  
L.-F. Tanguay ◽  
M. Sawan ◽  
Y. Savaria
Keyword(s):  
Low Power ◽  
Low Voltage ◽  
Charge Pump ◽  
Output Impedance ◽  
High Output Impedance ◽  
Very High ◽  
High Output

scholarly journals A Novel Current–Mode High–Frequency Polyphase Filter using Multi–Output Current Differencing Transconductance Amplifiers

2016 ◽  
Vol 67 (5) ◽  
pp. 311-322
Author(s):  
Hao Peng ◽  
Chunhua Wang ◽  
Xiaotong Tian
Keyword(s):  
Input Impedance ◽  
Current Mode ◽  
Output Impedance ◽  
Output Current ◽  
Polyphase Filter ◽  
Low Input ◽  
Centre Frequency ◽  
Transconductance Amplifiers ◽  
High Output Impedance ◽  
High Output

Abstract This paper introduces a novel polyphase filter working at high centre frequency using multi-output current differencing transconductance amplifiers (MOCDTAs). The MOCDTA possesses characteristics of low input impedance, high output impedance, wide work frequency and linearly adjustable transconductance. The proposed filter consists of two MOCDTAs, two grounded capacitors, and no resistors. The features of low input impedance and high output impedance make it suitable for cascade. The bandwidth and centre frequency could be adjusted independently by external bias voltage VC and VCa. The image rejection ratio (IRR) could reach 31.6 dB at the centre frequency of 114 MHz, and its bandwidth could be 11.1 MHz. Besides, the centre frequency could be tuned from 38 MHz to 150 MHz with bandwidth of 20.1 MHz. Simulation results which verify the theory are included.

Low power high output impedance high bandwidth QFGMOS current mirror

2014 ◽  
Vol 45 (8) ◽  
pp. 1132-1142 ◽  
Author(s):  
Nikhil Raj ◽  
Ashutosh Kumar Singh ◽  
Anil Kumar Gupta
Keyword(s):  
Low Power ◽  
Current Mirror ◽  
Output Impedance ◽  
High Bandwidth ◽  
High Output Impedance ◽  
High Output

A high output impedance current source

1994 ◽  
Vol 15 (2A) ◽  
pp. A79-A82 ◽  
Author(s):  
C W Denyer ◽  
F J Lidgey ◽  
Q S Zhu ◽  
C N McLeod
Keyword(s):  
Current Source ◽  
Output Impedance ◽  
High Output Impedance ◽  
High Output

High output impedance current-mode first-order allpass networks with four grounded components and two CCIIs

2006 ◽  
Vol 93 (9) ◽  
pp. 613-621 ◽  
Author(s):  
J.-W. Horng ◽  
C.-L. Hou ◽  
C.-M. Chang ◽  
W.-Y. Chung ◽  
H.-L. Liu ◽  
...  
Keyword(s):  
Current Mode ◽  
Output Impedance ◽  
First Order ◽  
High Output Impedance ◽  
High Output

GROUNDED CAPACITOR CM-APS WITH HIGH OUTPUT IMPEDANCE

2007 ◽  
Vol 16 (04) ◽  
pp. 567-576 ◽  
Author(s):  
SUDHANSHU MAHESHWARI
Keyword(s):  
Current Mode ◽  
Bias Current ◽  
Output Impedance ◽  
Quadrature Oscillator ◽  
Pspice Simulations ◽  
First Order ◽  
External Bias ◽  
High Output Impedance ◽  
High Output

This paper presents a new first order current mode all-pass section (CM-APS) with a grounded capacitor and employing a modified current controlled conveyor. The new circuit with high output impedance is ideal for current-mode cascading and is tunable through an external bias current. The proposed circuit is unique due to its features, not exhibited by any of the available works on the topic. An application of the circuit in realizing a quadrature oscillator is also given. The theory is validated through PSPICE simulations using real device transistors.

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