METHOD AND APPARATUS FOR OPTIMIZING POWER DISSIPATION IN A LOW NOISE AMPLIFIER
First Claim
1. A low noise amplifier, comprising:
- first, second and third differential amplifiers connected in series each having a terminal for receiving a power supply current; and
first and second switches responsive to a control signal, the first and second switches configured such that, (a) when the control signal is in a first state, the first switch and the second switch enable independent currents to flow in the terminals for receiving a power supply current; and
(b) otherwise, the first switch and the second switch enable the terminal for receiving a power supply current of the second differential amplifier to reuse a current provided to the terminal for receiving a power supply current of the third differential amplifier.
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Accused Products
Abstract
A method and a low noise amplifier are provided such that the low noise amplifier has a power dissipation that is adaptive to the noise interference levels. The low noise amplifer includes (i) first, second and third differential amplifiers connected in series each having a terminal for receiving a power supply current; and (ii) first and second switches responsive to a control signal, the first and second switches configured such that, (a) when the control signal is in a first state, the first switch and the second switch enable independent currents to flow in the terminals for receiving a power supply current; and (b) otherwise, the first switch and the second switch enable the terminal for receiving a power supply current of the second differential amplifier to reuse a current provided to the terminal for receiving a power supply current of the third differential amplifier. The control signal is provided by a radio frequency noise power detector, which senses an output signal of the low noise amplifier.
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Citations
8 Claims
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1. A low noise amplifier, comprising:
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first, second and third differential amplifiers connected in series each having a terminal for receiving a power supply current; and first and second switches responsive to a control signal, the first and second switches configured such that, (a) when the control signal is in a first state, the first switch and the second switch enable independent currents to flow in the terminals for receiving a power supply current; and
(b) otherwise, the first switch and the second switch enable the terminal for receiving a power supply current of the second differential amplifier to reuse a current provided to the terminal for receiving a power supply current of the third differential amplifier. - View Dependent Claims (2, 3, 4)
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5. A method for providing a low noise amplifier adaptive to interference, comprising:
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Connecting first, second and third differential amplifiers in series, each differential amplifier having a terminal for receiving a power supply current; and Controlling first and second switches by a control signal, the first and second switches configured such that, (a) when the control signal is in a first state, the first switch and the second switch enable independent currents to flow in the terminals for receiving a power supply current; and
(b) otherwise, the first switch and the second switch enable the terminal for receiving a power supply current of the second differential amplifier to reuse a current provided to the terminal for receiving a power supply current of the third differential amplifier. - View Dependent Claims (6, 7, 8)
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Specification