Power sensor for RF power amplifier
First Claim
1. A system for sensing RF amplifier output power comprising:
- a RF amplifier halving an amplifier transistor and further having a first RF signal input port and a first RF signal output port;
a sampling amplifier having a sampling transistor, a second RF signal input port coupled to the first RF signal input port and further having a second RF signal output port, wherein the sampling transistor is physically smaller than the amplifier transistor; and
a current sensing network being operatively connected to said second RF signal output port, wherein said current sensing network has a bias input port.
4 Assignments
0 Petitions
Accused Products
Abstract
A system for sensing RF amplifier output power includes an amplifier transistor and a sampling transistor that is physically smaller than the amplifier transistor. The sampling transistor is configured to sample the same RF input signal that is amplified by the amplifier transistor. A bias circuit associated with the transistors includes a selection of components based upon operating parameters as well as actual physical sizes of the transistors. The selection of component values in association with transistor sizes is used to enable generation of a current sensing signal that is proportional to the power level of the RF output signal generated by the amplifier transistor.
-
Citations
10 Claims
-
1. A system for sensing RF amplifier output power comprising:
-
a RF amplifier halving an amplifier transistor and further having a first RF signal input port and a first RF signal output port;
a sampling amplifier having a sampling transistor, a second RF signal input port coupled to the first RF signal input port and further having a second RF signal output port, wherein the sampling transistor is physically smaller than the amplifier transistor; and
a current sensing network being operatively connected to said second RF signal output port, wherein said current sensing network has a bias input port. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
Specification