A radio frequency apparatus and a voltage generating device thereof are provided. The voltage generating device includes a first switch and a second switch. A first terminal of the first switch receives a first voltage. A control terminal of the first switch receives a second voltage. A first terminal of the second switch receives the second voltage. A control terminal of the second switch receives the first voltage. A second terminal of the second switch and a second terminal of the first switch are coupled to an output node, wherein the output node outputs an output voltage related to at least one of the first voltage and the second voltage.

A radio frequency apparatus and a voltage generating device thereof are provided. The voltage generating device includes a first switch and a second switch. A first terminal of the first switch receives a first voltage. A control terminal of the first switch receives a second voltage. A first terminal of the second switch receives the second voltage. A control terminal of the second switch receives the first voltage. A second terminal of the second switch and a second terminal of the first switch are coupled to an output node, wherein the output node outputs an output voltage related to at least one of the first voltage and the second voltage.

A multi-deck circuit arrangement including a first deck circuit having a negative supply terminal and a second deck having a positive supply terminal connected to the negative supply terminal. A single power supply provides a voltage across both the first and second decks. The total power consumption will be less than the prior art of having both deck circuits conventionally regulated. The supply rail connecting the second deck's positive supply terminal to the first deck's negative supply terminal may be regulated. In one embodiment, the rail voltage can be controlled to optimize deck circuit operation for speed and power and to avoid level shifters when interfacing to other circuits.

A multi-deck circuit arrangement including a first deck circuit having a negative supply terminal and a second deck having a positive supply terminal connected to the negative supply terminal. A single power supply provides a voltage across both the first and second decks. The total power consumption will be less than the prior art of having both deck circuits conventionally regulated. The supply rail connecting the second deck's positive supply terminal to the first deck's negative supply terminal may be regulated. In one embodiment, the rail voltage can be controlled to optimize deck circuit operation for speed and power and to avoid level shifters when interfacing to other circuits.

A multi-deck circuit arrangement including a first deck circuit having a negative supply terminal and a second deck having a positive supply terminal connected to the negative supply terminal. A single power supply provides a voltage across both the first and second decks. The total power consumption will be less than the prior art of having both deck circuits conventionally regulated. The supply rail connecting the second deck's positive supply terminal to the first deck's negative supply terminal may be regulated. In one embodiment, the rail voltage can be controlled to optimize deck circuit operation for speed and power and to avoid level shifters when interfacing to other circuits.

A multi-deck circuit arrangement including a first deck circuit having a negative supply terminal and a second deck having a positive supply terminal connected to the negative supply terminal. A single power supply provides a voltage across both the first and second decks. The total power consumption will be less than the prior art of having both deck circuits conventionally regulated. The supply rail connecting the second deck's positive supply terminal to the first deck's negative supply terminal may be regulated. In one embodiment, the rail voltage can be controlled to optimize deck circuit operation for speed and power and to avoid level shifters when interfacing to other circuits.

A radio frequency apparatus and a voltage generating device thereof are provided. The voltage generating device includes a first switch and a second switch. A first terminal of the first switch receives a first voltage. A control terminal of the first switch receives a second voltage. A first terminal of the second switch receives the second voltage. A control terminal of the second switch receives the first voltage. A second terminal of the second switch and a second terminal of the first switch are coupled to an output node, wherein the output node outputs an output voltage related to at least one of the first voltage and the second voltage.

Methods and systems for electro-absorption modulator drivers in CMOS may comprise an electro-absorption modulator optically coupled to a laser source and electrically coupled to a modulator driver circuit that is in a complementary metal oxide semiconductor (CMOS) chip. The electro-absorption modulator includes a summer for receiving a negative bias voltage and a programmable offset voltage, a voltage regulator for receiving the output of the summer and generating a negative DC voltage of lower magnitude than the negative bias voltage, level shifting circuitry for shifting a received data signal to a DC voltage level between the negative DC voltage from the voltage regulator and the negative bias voltage, and an electrical coupling structure for DC-coupling the level shifted data signal to the modulator. The bias voltage may be received from an off-chip low drop out (LDO) voltage regulator. The level shifting circuitry may include cascode CMOS transistors and a current mirror.

Methods and systems for electro-absorption modulator drivers in CMOS may comprise an electro-absorption modulator optically coupled to a laser source and electrically coupled to a modulator driver circuit that is in a complementary metal oxide semiconductor (CMOS) chip. The electro-absorption modulator includes a summer for receiving a negative bias voltage and a programmable offset voltage, a voltage regulator for receiving the output of the summer and generating a negative DC voltage of lower magnitude than the negative bias voltage, level shifting circuitry for shifting a received data signal to a DC voltage level between the negative DC voltage from the voltage regulator and the negative bias voltage, and an electrical coupling structure for DC-coupling the level shifted data signal to the modulator. The bias voltage may be received from an off-chip low drop out (LDO) voltage regulator. The level shifting circuitry may include cascode CMOS transistors and a current mirror.

Methods and systems for electro-absorption modulator drivers in CMOS may comprise an electro-absorption modulator optically coupled to a laser source and electrically coupled to a modulator driver circuit that is in a complementary metal oxide semiconductor (CMOS) chip. The electro-absorption modulator includes a summer for receiving a negative bias voltage and a programmable offset voltage, a voltage regulator for receiving the output of the summer and generating a negative DC voltage of lower magnitude than the negative bias voltage, level shifting circuitry for shifting a received data signal to a DC voltage level between the negative DC voltage from the voltage regulator and the negative bias voltage, and an electrical coupling structure for DC-coupling the level shifted data signal to the modulator. The bias voltage may be received from an off-chip low drop out (LDO) voltage regulator. The level shifting circuitry may include cascode CMOS transistors and a current mirror.