Signal transmission circuit of a wireless telephone handset
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jul 16, 2002
Grant Date -
N/A
app pub date -
Feb 18, 2000
filing date -
Mar 4, 1999
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The invention relates to a signal transmission circuit of a wireless telephone handset for reducing power consumption. The signal transmission circuit comprises a voice transformation circuit for transforming a user's voice into a voice signal, a voice modulator electrically connected to the voice transformation circuit for modulating the voice signal and transforming it into a radio frequency signal, a power amplifier electrically connected to the voice modulator for amplifying the radio frequency signal, a first switch electrically connected to the power amplifier for turning the power amplifier on and off, an antenna for transmitting the radio frequency signal outputted from the power amplifier, and a control circuit for controlling operations of the telephone handset. When the telephone handset is transmitting the radio frequency signal using the antenna, the control circuit turns on the power amplifier by using the first switch so that the radio frequency signal generated by the voice modulator can be amplified by the power amplifier before being transmitted through the antenna. When the telephone handset is receiving a radio frequency signal, the control circuit turns off the power amplifier by using the first switch to reduce power consumption.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully