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Amplificador de Transconductancia OTA

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Re: Amplificador de Transconductancia OTA

Notapor pichu » Lun, 26 Mar 2012, 11:28

A Powerline Communication Line Driver Requirement
http://www.ti.com/lit/an/sboa120/sboa120.pdf

1 Introduction .................................................................................................................. 2
2 Powerline Media ............................................................................................................ 2
3 Line Driver ................................................................................................................... 2
4 Implications .................................................................................................................. 4
5 Conclusion ................................................................................................................... 9
List of Figures
1 Output Voltage and Current Limitations (OPA2673) ................................................................... 3
2 Output Voltage Headroom Model......................................................................................... 3
3 Simplified PLC Line Driver................................................................................................. 4
4 Power Spectral Density Mask ............................................................................................. 5
5 Power Spectral Density: Carrier Detail Example ....................................................................... 5
6 Analog DMT Signal Example.............................................................................................. 5
7 Typical Signal Chain........................................................................................................ 6
8 Complete Signal Chain..................................................................................................... 6
9 Complete PLC Line Driver Circuit ........................................................................................ 7
10 TxA Amplifier Transmitting While TxB Output is in Low-Impedance Mode: Harmonic Distortion vs
Frequency Load ............................................................................................................. 8
11 TxA Amplifier Transmitting While TxB Output is in Low-Impedance Mode: Harmonic Distortion vs Output
Voltage ....................................................................................................................... 8
12 TxA Amplifier Transmitting While TxB Output Stage is in Low-Impedance Mode: Circuit Configuration........ 8
13 TxA Amplifier Transmitting While TxB Output is Disabled: Harmonic Distortion vs Frequency Load ........... 9
14 TxA Amplifier Transmitting While TxB Output is Disabled: Harmonic Distortion vs Output Voltage ............. 9
pichu
 
Mensajes: 244
Registrado: Vie, 08 Jul 2011, 22:01


Re: Amplificador de Transconductancia OTA

Notapor pichu » Lun, 26 Mar 2012, 11:30

Wireline Data Transmission and Reception
http://www.ti.com/lit/an/sboa123/sboa123.pdf

1 Introduction .................................................................................................................. 2
2 High-Level Signal Chain ................................................................................................... 2
3 Implementation Example ................................................................................................... 7
4 Conclusion ................................................................................................................... 9
List of Figures
1 Attenuation vs Frequency for Cat5e and 75Ω Coax Cables .......................................................... 2
2 High-Level Signal Chain Block Diagram ................................................................................. 2
3 Output Voltage and Current Limitations (OPA2673) ................................................................... 3
4 Typical Application Driver Circuits ........................................................................................ 4
5 Differential Equalizer Circuit ............................................................................................... 5
6 Single-Ended Equalizer Circuit............................................................................................ 6
7 Differential Equalizer Circuit (VCA820) .................................................................................. 6
8 Equalizer Circuit for 100ft of Belden 1694F Coax Cable .............................................................. 6
9 Cable Equalization and Cable Attenuation Comparison ............................................................... 7
10 Twisted Pair Evaluation Circuit Model.................................................................................... 7
11 Belden 8723 Shielded Twisted-Pair Frequency Response............................................................ 7
12 Proposed Tx and Rx Schematic .......................................................................................... 8
13 Theoretical Gain Matching to the Attenuation........................................................................... 8
14 Developed Tx and Rx Circuit with the OPA683......................................................................... 9
15 Measured Circuit Performance............................................................................................ 9
List of Tables
1 Dual Amplifiers for Use as Twisted-Pair Drivers ........................................................................ 3
2 Single Amplifiers for Use as Coax Cable Drivers....................................................................... 3
3 Dual Amplifiers for Differential I/O Receiver Functions ................................................................ 4
4 Fully-Differential Amplifiers for Differential I/O Receiver Functions .................................................. 5
pichu
 
Mensajes: 244
Registrado: Vie, 08 Jul 2011, 22:01


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