Application of communication network theory to the electromagnetic seismograph

1964 ◽  
Vol 54 (5A) ◽  
pp. 1479-1489
Author(s):  
S. Dopp
Keyword(s):  
Communication Network ◽  
Transfer Function ◽  
Equivalent Circuit ◽  
Network Theory ◽  
Band Pass Filter ◽  
Pass Filter ◽  
Electromagnetic Seismograph ◽  
Band Pass

Abstract Communication network theory is applied to the equivalent circuit of the electromagnetic seismograph. The seismograph's transfer function is derived in the general case of an arbitrary linear passive coupling network between pendulum and galvanometer. Examples are given, one of which refers to the construction of a band-pass filter in the form of a lattice of filter galvanometers.

Design and Simulation of Photoelectric Detection Circuit for Microfluidics Chip

2013 ◽  
Vol 380-384 ◽  
pp. 3300-3303
Author(s):  
Ming Yuan Ren ◽  
Li Tian ◽  
Wei Wang ◽  
Xiao Wei Liu ◽  
Zhi Gang Mao
Keyword(s):  
Transfer Function ◽  
Detection System ◽  
Band Pass Filter ◽  
Pass Filter ◽  
Photoelectric Detection ◽  
Detection Circuit ◽  
Band Pass ◽  
Simulation Results ◽  
Integrated Microfluidics

This paper presents a photoelectric detection circuit for microfluidics chip. The proposed photoelectric detection system can reduce noise and increase sensitivity. It is consist of pre-amplifier, ac-amplifier and band-pass filter. The transfer function of photoelectric detection circuit is introduced. The circuit implementations and simulation results are given. The proposed photoelectric detection circuit is suitable for integrated microfluidics chip.

scholarly journals Band pass filter design with quasi-lumped resonators using equivalent circuit

Tehnika ◽  
2014 ◽  
Vol 69 (3) ◽  
pp. 459-465
Author(s):  
Dejan Miljanovic ◽  
Milka Potrebic ◽  
Dejan Tosic
Keyword(s):  
Equivalent Circuit ◽  
Filter Design ◽  
Band Pass Filter ◽  
Pass Filter ◽  
Band Pass

scholarly journals Passive optimization of pump noise transfer function by narrow band-pass filtering in femtosecond fiber lasers

2019 ◽  
Vol 7 ◽  
Author(s):  
Peng Qin ◽  
Sijia Wang ◽  
Minglie Hu ◽  
Youjian Song
Keyword(s):  
Transfer Function ◽  
Fiber Lasers ◽  
Transfer Functions ◽  
Narrow Band ◽  
Band Pass Filter ◽  
Intensity Noise ◽  
Pass Filter ◽  
Noise Transfer Function ◽  
Femtosecond Fiber Lasers ◽  
Band Pass

Fluctuation of pump power is one of the major sources of temporal and intensity noise in femtosecond fiber lasers. In this work, the transfer functions between the relative intensity noise (RIN) of the pump laser diode (LD) and the output RIN, between the RIN of the pump LD and timing jitter of femtosecond fiber lasers are systematically studied. It is demonstrated, for the first time to our knowledge, that the amplitude of the pump RIN transfer function can be effectively decreased by an intra-cavity narrow band-pass filter. In particular, for normal-dispersion lasers, the 3-dB bandwidth of the transfer function can also be narrowed by two-thirds, with a steeper falling edge. Furthermore, with the narrow band-pass filtering, the transfer function is almost independent of the net intra-cavity dispersion due to amplifier similariton formation. The proposed scheme can effectively isolate the pump-induced noise without the need of complex active pump LD control and intra-cavity dispersion management, thus providing an easy way for practical high-power, high-stability femtosecond fiber laser design and related high-precision applications outside the laboratory.

GENERATION OF GROUNDED CAPACITOR ICCII-BASED BAND-PASS FILTERS

2007 ◽  
Vol 16 (04) ◽  
pp. 553-566 ◽  
Author(s):  
AHMED M. SOLIMAN
Keyword(s):  
Transfer Function ◽  
Current Mode ◽  
Negative Resistance ◽  
Current Conveyor ◽  
Band Pass Filter ◽  
Spice Simulation ◽  
Pass Filter ◽  
Voltage Mode ◽  
Band Pass ◽  
Simulation Results

A new current-mode band-pass filter using the inverting second-generation current conveyor (ICCII) is introduced. The circuit is generated from a frequency-dependent negative resistance (FDNR)-C circuit realized using ICCII+. It is observed that a voltage-mode band-pass filter using two CCII+ has similar transfer function to this current-mode filter. The adjoint network theorem is used to demonstrate the transformation between the two circuits. Two new voltage-mode grounded capacitor band-pass filters using two ICCII are also introduced. The first voltage-mode circuit is generated from the FDNR-C circuit and employs two opposite Z polarity ICCII. The second voltage-mode circuit is obtained from the first circuit by relocation of the input and a grounded terminal. Two new additional grounded capacitor and grounded resistor current-mode band-pass filters with independent control on the filter Q are also introduced. Spice simulation results with 0.35 μm CMOS transistors model are included to demonstrate the practicality of the two ICCII- band-pass current-mode filter.

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