Energy harvesting circuits

An integrated circuit comprising:

• a first PMOS transistor with a gate terminal connected to a bias voltage node, a source terminal connected to an output of an AC-DC charge pump, and a drain terminal connected to a first node;
• a second PMOS transistor with a gate terminal connected to the bias voltage node, a source terminal connected to the output of the AC-DC charge pump, and a drain terminal connected to an output node;
• a first NMOS transistor with a gate terminal connected to the first node, a source terminal connected to a first input node, and a drain terminal connected to the first node;
• a second NMOS transistor with a gate terminal coupled to the output node, a source terminal connected to a second input node, and a drain terminal connected to the output node;
• and
• a third PMOS transistor with a gate terminal connected to the bias voltage node, a source terminal connected to an output of a DC-DC charge pump, and a drain terminal connected to the output node, wherein the DC-DC charge pump takes the output of the AC-DC charge pump as input.

An integrated circuit comprising:

• a first PMOS transistor with a gate terminal connected to a bias voltage node, a source terminal connected to an output of an AC-DC charge pump, and a drain terminal connected to a first node;
• a second PMOS transistor with a gate terminal connected to the bias voltage node, a source terminal connected to the output of the AC-DC charge pump, and a drain terminal connected to an output node;
• a first NMOS transistor with a gate terminal connected to the first node, a source terminal connected to a first input node, and a drain terminal connected to the first node;
• a second NMOS transistor with a gate terminal coupled to the output node, a source terminal connected to a second input node, and a drain terminal connected to the output node;
• and
• a third PMOS transistor with a gate terminal connected to the bias voltage node, a source terminal connected to an output of a DC-DC charge pump, and a drain terminal connected to the first node, wherein the DC-DC charge pump takes the output of the AC-DC charge pump as input.