Method for terminating harmonics of transistors
First Claim
1. A method for terminating a third harmonic frequency of a transistor amplifier comprising:
- determining the magnitude of the susceptance at said third harmonic frequency of initial circuitry attached to an output of a transistor, wherein said initial circuitry has no third harmonic termination;
determining whether the susceptance of said circuitry attached to the output of said transistor is capacitive or inductive at said third harmonic frequency; and
adding compensating parallel susceptance to the output of said transistor that is substantially equal in magnitude to the susceptance of said initial circuitry attached to the output of said transistor, but capacitive if said susceptance of said circuitry presented to the output of said transistor is inductive, or inductive if said susceptance presented to the output of said transistor is capacitive, whereby the imaginary part of the susceptance of the total circuitry attached to the output of said transistor is made small at said third harmonic frequency.
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Accused Products
Abstract
Generally, and in one form of the invention, a method is disclosed for terminating third harmonic frequency of a transistor amplifier comprising: determining the magnitude of the susceptance at the third harmonic frequency of initial circuitry, 41, 43, and 45, attached to the output of a transistor 39, wherein the initial circuitry has no third harmonic termination; determining whether the susceptance of the circuitry presented to the output of the transistor 39 is capacitive or inductive at the third harmonic frequency; and adding a compensating parallel susceptance 60 to the output of the transistor 39 that is substantially equal in magnitude to the susceptance of the circuitry attached to the output of the transistor 39, but capacitive if the susceptance of the circuitry presented to the output of the transistor 39 is inductive, or inductive if the susceptance presented to the output of the transistor 39 is capacitive, whereby the imaginary part of the susceptance of the total circuitry attached to the output of the transistor 39 is made small at the third harmonic frequency.
51 Citations
22 Claims
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1. A method for terminating a third harmonic frequency of a transistor amplifier comprising:
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determining the magnitude of the susceptance at said third harmonic frequency of initial circuitry attached to an output of a transistor, wherein said initial circuitry has no third harmonic termination; determining whether the susceptance of said circuitry attached to the output of said transistor is capacitive or inductive at said third harmonic frequency; and adding compensating parallel susceptance to the output of said transistor that is substantially equal in magnitude to the susceptance of said initial circuitry attached to the output of said transistor, but capacitive if said susceptance of said circuitry presented to the output of said transistor is inductive, or inductive if said susceptance presented to the output of said transistor is capacitive, whereby the imaginary part of the susceptance of the total circuitry attached to the output of said transistor is made small at said third harmonic frequency. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A circuit for terminating a third harmonic frequency of a transistor amplifier comprising:
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a matching circuit connected to an output of said transistor, said matching circuit having a first susceptance at said third harmonic frequency; a bias circuit connected to said output of said transistor, said bias circuit having a second susceptance at said third harmonic frequency; and a parallel compensating susceptance connected to an output of said transistor that is substantially equal in magnitude to the sum of said first susceptance and said second susceptance, but capacitive if said sum is inductive, or inductive if said sum is capacitive, whereby the imaginary part of the susceptance of the total circuitry attached to the output of said transistor is made small at said third harmonic frequency. - View Dependent Claims (10, 11, 12, 13, 14)
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15. A circuit for terminating a third harmonic frequency of a transistor comprising:
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a matching circuit connected to an output of said transistor, said matching circuit having a first susceptance at said third harmonic frequency; a bias circuit connected to said output of said transistor, said bias circuit having a second susceptance at said third harmonic frequency, wherein the sum of said first susceptance and said second susceptance is small at said third harmonic frequency. - View Dependent Claims (16, 17, 18)
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19. A circuit for terminating a third harmonic frequency of a transistor comprising:
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a matching circuit connected to an output of said transistor, said matching circuit having a first susceptance at said third harmonic frequency; a bias circuit connected to said output of said transistor, said bias circuit having a second susceptance at said third harmonic frequency; and a network for terminating a second harmonic frequency of said transistor amplifier, said network having a third susceptance, and further wherein the sum of said first susceptance, said second susceptance, and said third susceptance is small at said third harmonic frequency. - View Dependent Claims (20, 21, 22)
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Specification