Circuits for providing class-e power amplifiers

Patent metadata

Field	Value
Publication number	US-2017194920-A1
Application number	US-201615250447-A
Country	US
Kind code	A1
Filing date	Aug 29, 2016
Priority date	Apr 4, 2011
Publication date	Jul 6, 2017
Grant date	—

Abstract

In some embodiments, circuits for providing Class-E power amplifiers are provided, the circuits comprising: a first switch having a first side and a second side; a first Class-E load network coupled to the first side of the first switch; a second Class-E load network; and a second switch having a first side and a second side, the first side of the second switch being coupled the second side of the first switch and the second Class-E load network. In some embodiments, the circuits further comprise: a third switch having a first side and a second side; a third Class-E load network coupled to the first side of the third switch; a fourth Class-E load network; and a fourth switch having a first side and a second side, the first side of the fourth switch being coupled the second side of the third switch and the fourth Class-E load network.

First claim

1 . A circuit for forming an amplifier comprising:
a first switch having a first side and a second side; one of a first inductor and a first transmission line, the one of the first inductor and the transmission line having a first side connected to the first side of the first switch and having a second side connected to a non-ground power supply voltage; one of a second inductor and a second transmission line, the one of the second inductor and the second transmission line having a first side and a second side, the second side of the one of the second inductor and the second transmission line connected to a non-ground power supply voltage; and a second switch having a first side and a second side, the first side of the second switch being coupled to the second side of the first switch and the first side of the one of the second inductor and the second transmission line.

2 . The circuit of claim 1 , wherein the one of the first inductor and the first transmission line is the first inductor and the first inductor is a choke.

3 . The circuit of claim 1 , further comprising a first resonant filter having a first side and a second side, the first side of the resonant filter being coupled to a load and the second side of the resonant filter being coupled to the first side of the first switch.

4 . The circuit of claim 3 , wherein the first resonant filter includes an inductor and a capacitor.

5 . The circuit of claim 1 , wherein the one of the second inductor and the second transmission line is the second inductor and the second inductor is a choke.

6 . The circuit of claim 1 , further comprising a second resonant filter having a first side and a second side, the first side of the second resonant filter being coupled to a load and the second side of the second resonant filter being coupled to the first side of the second switch.

7 . The circuit of claim 6 , wherein the second resonant filter includes an inductor and a capacitor.

8 . The circuit of claim 1 , wherein each of the first switch and the second switch include a field effect transistor, and wherein the first side and the second side of each of the first switch and the second switch correspond to a source and a drain of the field effect transistor.

9 . The circuit of claim 1 , further comprising an impedance transformation network coupled to the first side of the first switch.

10 . The circuit of claim 9 , wherein the impedance transformation network is also coupled to the first side of the second switch.

11 . The circuit of claim 9 , wherein the impedance transformation network includes a first capacitor, a second capacitor, and a transmission line.

12 . The circuit of claim 1 , wherein the second switch includes a control input coupled to an input signal.

13 . The circuit of claim 12 , wherein the control input of the second switch is a gate of a field effect transistor.

14 . The circuit of claim 12 , wherein the control input is coupled to the input signal by an impedance transformation network.

15 . The circuit of claim 14 , wherein the impedance transformation network includes a transmission line and a capacitor.

16 . The circuit of claim 1 , further comprising:
a third switch having a first side and a second side; a first Class-E load network coupled to the first side of the third switch; a second Class-E load network; and a fourth switch having a first side and a second side, the first side of the fourth switch being coupled to the second side of the third switch and the second Class-E load network.

17 . The circuit of claim 16 , further comprising:
a first transmission line having a first side and a second side, wherein the first side is coupled to an input signal and the second side is coupled to a control input of at least one of the first switch and the second switch; and a second transmission line having a first side and a second side, wherein the first side is coupled to the input signal and the second side is coupled to a control input of at least one of the third switch and the fourth switch.

Assignees

• Chakrabarti Anandaroop
• Krishnaswamy Harish
• Univ Columbia

Inventors

• Chakrabarti Anandaroop
• Krishnaswamy Harish

Classifications

• H03F2200/387

  A circuit being added at the output of an amplifier to adapt the output impedance of the amplifier · CPC title

• H03F3/2176 Primary

  Class E amplifiers · CPC title

• H03F1/56

  Modifications of input or output impedances, not otherwise provided for · CPC title

• H03F2200/222

  A circuit being added at the input of an amplifier to adapt the input impedance of the amplifier · CPC title

• H03F2200/402

  A series resonance being added in shunt in the output circuit, e.g. base, gate, of an amplifier stage · CPC title