Amplifier
First Claim
1. An amplifier comprising:
- a pair of power input terminals configured to receive differential transmission signals, the differential transmission signals being two-tone signals;
a pair of power output terminals;
a coil configured to have a first terminal and a second terminal, the first terminal and the second terminal being connected with the pair of power input terminals, respectively, and to have a center tap;
a first transistor configured to have a first gate connected with the first terminal of the coil, and a first output terminal connected with one of the pair of power output terminals;
a second transistor configured to have a second gate connected with the second terminal of the coil, and a second output terminal connected with another of the pair of power output terminals;
a diode configured to have a third terminal and a fourth terminal, the third terminal being connected with the center tap of the coil;
a gate voltage generation unit configured to have a seventh terminal connected with the fourth terminal of the diode, the seventh terminal outputting a predetermined gate voltage to turn on the first transistor and the second transistor; and
a capacitor configured to have a fifth terminal and a sixth terminal, the fifth terminal being connected with a point between the fourth terminal of the diode and the seventh terminal of the gate voltage generation unit, the sixth terminal being connected with a reference potential point,wherein an inductance of the coil and a capacitance of the capacitor are set to respective values so that a resonance frequency obtained in an LC resonance circuit including the coil and the capacitor becomes a frequency of a double harmonic wave of the transmission signals input into the pair of power input terminals, andwherein the diode is configured to adjust a voltage at the third terminal depending on a signal level of the double harmonic wave of the transmission signals supplied to the third terminal from the center tap of the coil.
3 Assignments
0 Petitions
Accused Products
Abstract
An amplifier includes two input terminals to receive a differential, two-tone transmission signal; two output terminals; a coil having terminals connected with the input terminals respectively, and a center tap; a first transistor having the gate connected with one terminal of the coil, and the output terminal connected with one output terminal; a second transistor having the gate connected with the other terminal of the coil, and the output terminal connected with the other output terminal; a diode having a terminal connected with the center tap; and a bias circuit connected with the other terminal of the diode to output a gate voltage to turn on the first and second transistors. The diode adjusts the terminal voltage depending on a signal level of a double harmonic wave of the transmission signal supplied to the terminal of the diode from the center tap.
9 Citations
5 Claims
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1. An amplifier comprising:
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a pair of power input terminals configured to receive differential transmission signals, the differential transmission signals being two-tone signals; a pair of power output terminals; a coil configured to have a first terminal and a second terminal, the first terminal and the second terminal being connected with the pair of power input terminals, respectively, and to have a center tap; a first transistor configured to have a first gate connected with the first terminal of the coil, and a first output terminal connected with one of the pair of power output terminals; a second transistor configured to have a second gate connected with the second terminal of the coil, and a second output terminal connected with another of the pair of power output terminals; a diode configured to have a third terminal and a fourth terminal, the third terminal being connected with the center tap of the coil; a gate voltage generation unit configured to have a seventh terminal connected with the fourth terminal of the diode, the seventh terminal outputting a predetermined gate voltage to turn on the first transistor and the second transistor; and a capacitor configured to have a fifth terminal and a sixth terminal, the fifth terminal being connected with a point between the fourth terminal of the diode and the seventh terminal of the gate voltage generation unit, the sixth terminal being connected with a reference potential point, wherein an inductance of the coil and a capacitance of the capacitor are set to respective values so that a resonance frequency obtained in an LC resonance circuit including the coil and the capacitor becomes a frequency of a double harmonic wave of the transmission signals input into the pair of power input terminals, and wherein the diode is configured to adjust a voltage at the third terminal depending on a signal level of the double harmonic wave of the transmission signals supplied to the third terminal from the center tap of the coil. - View Dependent Claims (2, 3, 4)
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5. An amplifier comprising:
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a power input terminal configured to receive a single-ended transmission signal, the single-ended transmission signal being a two-tone signal; an power output terminal; a filter configured to have an input terminal and an output terminal, the input terminal being connected with the power input terminal, the filter transmitting a double harmonic wave of the transmission signal; a coil configured to have a first terminal and a second terminal, the first terminal being connected with the output terminal of the filter; a transistor configured to have a gate connected with the input terminal of the filter, and an output terminal being connected with the power output terminal; a diode configured to have a third terminal and a fourth terminal, the third terminal of the diode being connected with the second terminal of the coil; and a gate voltage generation unit configured to have a fifth terminal being connected with the fourth terminal of the diode, the fifth terminal outputting a predetermined gate voltage to turn on the transistor; and a capacitor configured to have a sixth terminal and a seventh terminal, the sixth terminal connected with a point between the fourth terminal of the diode and the fifth terminal of the gate voltage generation unit, and the seventh terminal being connected with a reference potential point, wherein an inductance of the coil and a capacitance of the capacitor are set to respective values so that a resonance frequency obtained in an LC resonance circuit including the coil and the capacitor becomes a frequency of the double harmonic wave of the transmission signal input into the power input terminal, and wherein the diode is configured to adjust a voltage at the third terminal depending on a signal level of the double harmonic wave of the transmission signal supplied to the third terminal of the diode via the coil.
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Specification