sw/hw co-design term project charge pump system for dc/ac conversion with changeable frequency
DESCRIPTION
SW/HW Co-design Term Project Charge Pump System For DC/AC Conversion with Changeable Frequency. R92943074 胡以農 R92943061 詹作晟. Outline. System Block Diagram Charge Pump Circuit Oscillator Circuit Control Signal ADC Circuit Simulation Results Conclusion. System Block Diagram. - PowerPoint PPT PresentationTRANSCRIPT
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SW/HW Co-design
Term Project
Charge Pump System For DC/AC Conversion with Changeable
Frequency
R92943074 胡以農R92943061 詹作晟
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Outline
System Block Diagram Charge Pump Circuit Oscillator Circuit Control Signal ADC Circuit Simulation Results Conclusion
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System Block Diagram
DC Charge Pump
Oscillator
1.8 V 3.6 V
Vdd
Control
AC Charge Pump
ADC
Clock
Clock
7.2 V
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Charge Pump Circuit
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Analysis of The Charge Pump
Charge phase Transfer phase
Vin CinCf
- Vin +
LOAD
CfVin Cin
Cout
q2Vin
_
+
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Waveform of DC Charge Pump
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Charge Pump For DC/AC Conversion
RL
Vin Cin
S11 S12
S17 S19S18
S15
S1
S13
Charge Pump 1
Cf1 Cf2
S14
S16
S21S22
S27S29 S28
S25
S2
S23
Charge Pump 2
Cf4Cf5
S24
S26
S10 S20Cf3 Cf6
V1 V2
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Phase 1
RL
Vin Cin
S11 S12
S17 S19S18
S15
S1
S13
Charge Pump 1
Cf1 Cf2S14
S16
S21S22
S27S29 S28
S25
S2
S23
Charge Pump 2
Cf4Cf5S24
S26
S10 S20
Cf3 Cf6
- Vin + - Vin + - Vin + - Vin + - Vin + - Vin +
V1 V2
- Vo +
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Phase 2
RL
Vin Cin
S11 S12
S17 S19S18
S15
S1
S13
Charge Pump 1
Cf1 Cf2S14
S16
S21S22
S27S29 S28
S25
S2
S23
Charge Pump 2
Cf4Cf5S24
S26
S10 S20
Cf3 Cf6
- Vin + - Vin + - Vin + - Vin + - Vin + - Vin +V1 V2
- Vo +
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AC Output Voltage
t
4Vin
0 t
V1
4Vin
0 t
V2
Vo
t
4Vin
-4Vin
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Waveform of AC Waveform
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Oscillator Circuit
VL
VH
C
I
VH
VL
H
H
f = I/2CV
L L
L LS
R
Q
V=(VH-VL) I
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Control Signal
Op
Oscillator
AADC
Control signals0000
0001
0011
0111
1111
Charge Pump
Cf
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ADC Simulation Circuit
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Matlab Simulation
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Simulation Result
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Conclusion
Use more than one small capacitor in a chip to achieve the large driving current ability.
Use low voltage to produce a high voltage in order to drive a system.