Amplifiers – With control of power supply or bias voltage – With control of input electrode or gain control electrode bias
Patent
1998-05-29
2000-08-01
Pascal, Robert
Amplifiers
With control of power supply or bias voltage
With control of input electrode or gain control electrode bias
455126, H03G 320
Patent
active
060972513
ABSTRACT:
In order to increase the resolution of signals input to a power amplifier, this system includes a power control circuit which utilizes sigma delta modulated values which are stored in a memory device. These values, after retrieval from an addressable memory, are supplied only to a low pass filter before being sent to the control input of the power amplifier. The use of sigma delta modulated values can result in a reduction of hardware within the power control circuit of communication devices and increase the signal resolution by moving noise elements from the signal.
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Gardenfors Karl H.ang.kan Torbjorn
Grahm Lars Gunnar Torbjorn
Khullar Anders
Sedvallson Sven Hans Sebastian
Nguyen Khanh V.
Pascal Robert
Telefonaktiebolaget LM Ericsson
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