Circuit that operates in a manner substantially complementary to an amplifying device included therein and apparatus incorporating same

A three-terminal circuit that operates in a manner similar to a P-channel metal oxide semiconductor field effect transistor (MOSFET), the circuit comprising:

• an N-channel MOSFET having a gate terminal, a drain terminal, and a source terminal;
• and
• a four-terminal voltage controlled voltage source (VCVS) having a negative input terminal, a positive input terminal connected to the drain terminal of the N-channel MOSFET, a positive output terminal coupled to the gate terminal of the N-channel MOSFET, and a negative output terminal coupled to the source terminal of the N-channel MOSFET;
• wherein the negative input terminal of the VCVS corresponds to a first terminal of the circuit, the drain terminal of the N-channel MOSFET corresponds to a second terminal of the circuit, and the source terminal of the N-channel MOSFET corresponds to a third terminal of the circuit.

A power amplifier comprising:

• an interface for receiving an input signal;
• and
• an amplifier circuit, coupled to the interface, for amplifying the input signal, wherein the amplifier circuit comprises:
• a voltage controlled voltage source (VCVS) having a positive input terminal, a negative input terminal, a positive output terminal, and a negative output terminal;
• and
• a three-terminal amplifying device having a first terminal coupled to the positive output terminal of the VCVS, a second terminal coupled to the positive input terminal of the VCVS, and a third terminal coupled to the negative output terminal of the VCVS;
• whereby when the input signal is applied to the negative input terminal of the VCVS, the amplifier circuit operates in a manner substantially complementary to the amplifying device.

A stereo receiver comprising:

• a tuner for selecting an input signal to be received;
• and
• a low frequency power amplifier, coupled to the tuner, wherein the low frequency power amplifier comprises:
• a low frequency interface for receiving the input signal;
• and
• an amplifier circuit, coupled to the low frequency interface, for amplifying the input signal, wherein the amplifier circuit comprises:
• a voltage controlled voltage source (VCVS) having a positive input terminal, a negative input terminal, a positive output terminal, and a negative output terminal;
• and
• a three-terminal amplifying device having a first terminal coupled to the positive output terminal of the VCVS, a second terminal coupled to the positive input terminal of the VCVS, and a third terminal coupled to the negative output terminal of the VCVS;
• whereby when the input signal is applied to the negative input terminal of the VCVS, the amplifier circuit operates in a manner substantially complementary to the amplifying device.