Patent ID: 7161434

Claim:
An amplifier comprising a field effect transistor with output capacitance C 1 , a terminating network comprising inductors connected in series separated by capacitors connected in parallel, a filter and a load, wherein the values of the capacitors and inductors are arranged to present open circuits to a predetermined number of odd harmonics of a signal frequency being amplified, and to present short circuits to a predetermined number of even harmonics of the signal frequency, wherein the normalised values of the inductors and capacitors of the terminating network are selected using the following procedure: Let ⁢ ⁢ g r = ⁢ C r ⁢ r ⁢ ⁢ odd = ⁢ L r ⁢ r ⁢ ⁢ even then g 1 = 1 , ⁢ g 1 ⁢ g 2 = 1 m ⁡ ( 2 ⁢ m - 1 ) ⁢ g r ⁢ g r + 1 = 4 ( 2 ⁢ m - 1 + r ) ⁢ ( 2 ⁢ m - r ) ⁢ ⁢ r = 2 -> 2 ⁢ m - 1 and ⁢ g 2 ⁢ m ⁢ g 2 ⁢ m + 1 = 1 m where (m−1) represents the predetermined number of odd harmonics which are presented with an open circuit.