Dual mode amplifier
First Claim
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1. In an electrical circuit for amplifying an electrical signal received at an input node the combination comprising:
- a first amplifier means coupled to said input node for amplifying said electrical signal and providing a first output signal;
a second amplifier means coupled to said input node for amplifying said electrical signal and providing a second output signal;
a mode selector means coupled to the first amplifier means and to the second amplifier means and to said input node responsive to said electrical signal to provide a power input signal selected from said first and second output signals;
a power amplifier means which operates in two modes coupled to the mode selector means and responsive to said power input signal, said power amplifier operating in a linear mode when the power input signal is said first output signal and in a switching mode when the power input signal is said second output signal.
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Abstract
An apparatus amplifies a signal in two different modes. The apparatus amplifies the signal in a linear mode when the voltage of the signal is much less than the voltage of the power source, and in a switching mode when the signal is at other voltages.
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Citations
8 Claims
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1. In an electrical circuit for amplifying an electrical signal received at an input node the combination comprising:
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a first amplifier means coupled to said input node for amplifying said electrical signal and providing a first output signal; a second amplifier means coupled to said input node for amplifying said electrical signal and providing a second output signal; a mode selector means coupled to the first amplifier means and to the second amplifier means and to said input node responsive to said electrical signal to provide a power input signal selected from said first and second output signals; a power amplifier means which operates in two modes coupled to the mode selector means and responsive to said power input signal, said power amplifier operating in a linear mode when the power input signal is said first output signal and in a switching mode when the power input signal is said second output signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification