A Home-use Digital VCR With High Density Modulation Method

2005 ◽  
Author(s):  
T. Noguchi ◽  
M. Nakamura ◽  
N. Amada ◽  
S. Yamazaki ◽  
T. Arai ◽  
...  
Keyword(s):  
High Density ◽  
Modulation Method ◽  
Density Modulation

A home-use digital VCR with high density modulation method

1992 ◽  
Vol 38 (3) ◽  
pp. 230-235 ◽  
Author(s):  
T. Noguchi ◽  
M. Nakamura ◽  
N. Amada ◽  
S. Yamazaki ◽  
T. Arai ◽  
...  
Keyword(s):  
High Density ◽  
Modulation Method ◽  
Density Modulation

A New PDM Power Control Technology for the Resonant Inverter

2013 ◽  
Vol 744 ◽  
pp. 552-555
Author(s):  
Zhi Bin Lu ◽  
Yong Long Peng ◽  
Ya Bin Li
Keyword(s):  
Output Power ◽  
Modular Design ◽  
Load Condition ◽  
Modulation Method ◽  
Output Current ◽  
Light Load ◽  
Continuous Output ◽  
Pulse Density ◽  
Density Modulation ◽  
Pulse Density Modulation

Pulse density modulation (PDM) can be used to regulate the output power of the resonant converter. However, in some case of low Q value, the output current is discontinuous and unstable in light load condition which is regulated by PDM. In order to solve this problem, a new Hybrid Pulse Density Modulation method is proposed. The principle of the Hybrid Pulse Density Modulation technique and the control method are analyzed in detail. Through experiments, it is proven that this method not only has the advantages of symmetrical control pulse distribution, smooth and continuous output current, simple control. It also achieves modular design, we can adjust the levels of the inverters output power flexibly through change the number of the basic control module.

scholarly journals An 8-15 Modulation Method Suitable for High Density Digital Recording.

1996 ◽  
Vol 50 (8) ◽  
pp. 1142-1149
Author(s):  
Akiomi Kunisa ◽  
Seiichiro Takahashi ◽  
Nobuo Itoh
Keyword(s):  
High Density ◽  
Modulation Method ◽  
Digital Recording

Modeling of the AC/HF/DC converter with power factor correction

2010 ◽  
Vol 59 (3-4) ◽  
pp. 141-152
Author(s):  
Antoni Bogdan
Keyword(s):  
Power Factor ◽  
High Frequency ◽  
Power Factor Correction ◽  
Modulation Method ◽  
Resonant Circuit ◽  
Modeling Approach ◽  
High Frequency Transformer ◽  
Pulse Density ◽  
Density Modulation ◽  
Correction System

Modeling of theAC/HF/DCconverter with power factor correctionIn this paper, the power factor correction system consisted of: bridge converter, parallel resonant circuit, high frequency transformer, diode rectifier andLFCFfilter is presented. This system is controlled by a pulse density modulation method and the principle of its operation is based on the boost technique. The modeling approach is illustrated by an example usingAC/HF/DCconverter. Verification of the derived model is provided, which demonstrated the validity of the proposed approach.

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