US 12,463,461 B2
RF-DC converter for energy harvesting using CMOS N-well process
Muneer A. Al-Absi, Dhahran (SA)
Assigned to KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS, Dhahran (SA)
Filed by KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS, Dhahran (SA)
Filed on Jan. 11, 2024, as Appl. No. 18/410,053.
Prior Publication US 2025/0233452 A1, Jul. 17, 2025
Int. Cl. H02J 50/00 (2016.01); H03K 17/06 (2006.01); H03K 17/10 (2006.01); H03K 17/687 (2006.01)
CPC H02J 50/001 (2020.01) [H03K 17/063 (2013.01); H03K 17/102 (2013.01); H03K 17/6871 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A radio frequency to direct current (RF-DC) converter, comprising:
a first cross-coupled circuit including:
a first NMOS transistor, a first PMOS transistor, a second NMOS transistor and a second PMOS transistor, wherein each of the first NMOS transistor, the second NMOS transistor, the first PMOS transistor and the second PMOS transistor are formed on a substrate by an n-well process; and
a second cross-coupled circuit connected to an output of the first cross-coupled circuit, the second cross-coupled circuit including:
a third PMOS transistor, a fourth PMOS transistor, a fifth PMOS transistor and a sixth PMOS transistor, wherein each of the third PMOS transistor, the fourth PMOS transistor, the fifth PMOS transistor and the sixth PMOS transistor are formed on the substrate by the n-well process; and
an RF voltage source connected to the RF-DC converter,
wherein the first cross-coupled circuit further comprises:
a first capacitor connected to a drain terminal of the first NMOS transistor and to a drain terminal of the first PMOS transistor;
a second capacitor connected to a drain terminal of the second NMOS transistor and to a drain terminal of the second PMOS transistor;
a ground terminal connected to a body terminal and a source terminal of the first NMOS transistor and to a body terminal and a source terminal of the second NMOS transistor;
a first cross-coupling connector connected to a gate of the first NMOS transistor, to a gate of the first PMOS transistor and to the second capacitor;
a second cross-coupling connector connected to a gate of the second NMOS transistor, to a gate of the second PMOS transistor and to the first capacitor; and
an output terminal of the first cross-coupled circuit connected to a source terminal and a body terminal of the first PMOS transistor and to a source terminal and a body terminal of the second PMOS transistor; and
wherein the second cross-coupled circuit further comprises:
an input terminal connected to the output terminal of the first cross-coupled circuit, wherein the input terminal is connected to a drain terminal of the third PMOS transistor and to a drain terminal of the fourth PMOS transistor;
a third capacitor connected to a source terminal and a body terminal of the third PMOS transistor and to a source terminal and a body terminal of the fifth PMOS transistor;
a fourth capacitor connected to a source terminal and a body terminal of the fourth PMOS transistor and to a source terminal and a body terminal of the sixth PMOS transistor;
a third cross-coupling connector connected to a gate terminal of the third PMOS transistor, to a gate terminal of the sixth PMOS transistor and to the third capacitor;
a fourth cross-coupling connector connected to a gate terminal of the fourth PMOS transistor, to a gate of the fifth PMOS transistor and to the fourth capacitor; and
an output terminal of the second cross-coupled circuit connected to a body terminal and a source terminal of the fifth PMOS transistor and to a body terminal and a source terminal of the sixth PMOS transistor.