Design And Analysis Of Discrete High Slew Rate Low Noise Voltage Regulator For RF Transceiver System
Communication system consists of various circuits and having a good and regulated source is crucial in order to get the desired signals at the output. The common problems in getting such good sources are spikes, ripple and fluctuating DC input. Linear voltage regulator is a source circuit to su...
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| Format: | Monograph |
| Language: | English |
| Published: |
Universiti Sains Malaysia
2005
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| Subjects: | |
| Online Access: | http://eprints.usm.my/57603/1/Design%20And%20Analysis%20Of%20Discrete%20High%20Slew%20Rate%20Low%20Noise%20Voltage%20Regulator%20For%20RF%20Transceiver%20System_Mardiana%20Mohamad%20Noor.pdf http://eprints.usm.my/57603/ |
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| Institution: | Universiti Sains Malaysia |
| Language: | English |
| Summary: | Communication system consists of various circuits and having a good and
regulated source is crucial in order to get the desired signals at the output. The common
problems in getting such good sources are spikes, ripple and fluctuating DC input.
Linear voltage regulator is a source circuit to supply a steady, constant output. In
addition to its basic function, an attempt to implement its usage in the radio frequency
circuits has been made through out this project. Three regulator circuits have been
designed, which are negative voltage regulator, positive voltage regulator and ripple
rejection voltage regulator. The basic schematics for these circuits were implemented
from two types of integrated chips; LM317 and µA723. The positive voltage regulator is
used to detect positive peak of ripple input voltage and negative voltage regulator
performs vice versa task. Ripple rejection voltage regulator acts as an auto-ripple
rejecter circuit, which will reject the ripple detected by positive and negative voltage
regulators and supply smooth and constant input to the next circuitry. As the gain of the
ripple rejection voltage regulator is very small compared to the input voltage, this
regulator also can be applied in the gain compression circuit. Those circuits designed in
this project are direct transformation from the schematics used in the low frequencies to
the design using microstrips for RF circuits. |
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