US 2019/0103839 A1 · RADIO FREQUENCY (RF) RECEIVER CIRCUIT

Abstract

An integrated circuit includes a first high-pass filter having an input coupled to receive a first signal and an output coupled to a first input of a first differential pair of transistors. A second high-pass filter includes an input coupled to receive a second signal and an output coupled to a second input of the first differential pair of transistors. The second signal may be a complementary signal of the first signal. A second differential pair of transistors includes control electrodes coupled to a first voltage supply terminal. A boost circuit is coupled between the second differential pair of transistors and the first voltage supply terminal. A low-pass filter is coupled between the first differential pair of transistors and the second differential pair of transistors.

Claims20

Dependent claims

An integrated circuit comprising:

a first input terminal coupled to receive a first signal;
a second input terminal coupled to receive a second signal, the second signal a complementary signal of the first signal;
a first high-pass filter coupled between the first input terminal and a control electrode of a first transistor;
a second high-pass filter coupled between the second input terminal and a control electrode of a second transistor;
a third transistor having a control electrode coupled to a first voltage supply terminal and a first current electrode coupled to a first output terminal;
a fourth transistor having a control electrode coupled to the first voltage supply terminal and a first current electrode coupled to a second output terminal;
an output resistor coupled between the first output terminal and the second output terminal;
and
a low-pass filter coupled between first current electrodes of the first and second transistors and second current electrodes of the third and fourth transistors.

6 more elements

An integrated circuit comprising:

a first amplifier circuit comprising:
a first high-pass filter having an input coupled to receive a first signal and an output coupled to a first input of a first differential pair of transistors;
a second high-pass filter having an input coupled to receive a second signal and an output coupled to a second input of the first differential pair of transistors, the second signal a complementary signal of the first signal;
a second differential pair of transistors having control electrodes coupled to a first voltage supply terminal;
a boost circuit coupled between the second differential pair of transistors and the first voltage supply terminal;
and
a low-pass filter coupled between the first differential pair of transistors and the second differential pair of transistors;
a low noise amplifier (LNA) circuit coupled to receive a radio frequency signal;
and
a first mixer circuit having a first differential input coupled to a differential output of the LNA circuit, and a first differential output coupled to inputs of the first and second high-pass filters of the first amplifier circuit.

7 more elements

Dependencies are inferred from the claim text.

Radio frequency (rf) receiver circuit

Life of this patent

Radio frequency (rf) receiver circuit

Life of this patent

Abstract

Claims20