Telecommunications – Transmitter and receiver at same station – Radiotelephone equipment detail
Reexamination Certificate
2006-07-18
2006-07-18
Matar, Ahmad F. (Department: 2642)
Telecommunications
Transmitter and receiver at same station
Radiotelephone equipment detail
C455S114300, C455S343100, C455S252100
Reexamination Certificate
active
07079860
ABSTRACT:
A first low noise amplifier (LNA1 111) is provided with a control terminal (1115) for turning of/off the low noise amplifier (LNA1 111). Power terminals of the low noise amplifier (LNA1 111) and a second low noise amplifier (LNA2 112) are commonly connected, and are connected to a power supply (10) via a power supply switch (1114). Ground terminals of the two amplifiers (LNA1 111) and (LNA2 112) are commonly connected, and a constant current source (1 115) is connected between the common terminal and the ground. The amplifiers (LNA1 111) and (LNA2 112) are turned on/off by switching the voltage applied to the control terminal (1115) of the first low noise amplifier (LNA1 111) between a high potential and a low potential. The power supply switch (1114) is turned off during signal transmission. Therefore, an LNA block can be provided by using only one power supply switch (1114), whereby it is possible to reduce the number of devices from that in the prior art, thereby realizing a reduction in the size thereof.
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International Search Report dated Jun. 20, 2000.
Fukumoto Shinji
Hidaka Kenichi
Motoyoshi Kaname
Watanabe Atsushi
Yamamoto Shinji
Le Karen L.
Matar Ahmad F.
McDermott Will & Emery LLP
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