Receiver with wide gain range

A receiver comprising:

• a transformer in a balanced/unbalanced (BALUN) configuration that produces a differential ingoing radio frequency (RF) signal based on an in-going RF signal received at an antenna;
• a passive gain stage configured to receive the differential in-going RF signal and a gain control signal to produce a gain adjusted in-going RF signal based on the gain control signal;
• at least one low noise amplifier (LNA) coupled to receive the gain adjusted in-going RF signal, the at least one LNA further including an output port to produce an amplified in-going RF signal and a selectable source degeneration circuit coupled to and configured to selectively reduce current flow through the LNA;
• mixer circuitry comprising an input coupled to receive the amplified in-going RF signal produced by the at least one LNA, wherein the mixer circuitry is configured to produce a down-converted signal at either an intermediate frequency (IF) or baseband frequency (BB) having in-phase and quadrature phase components;
• and
• a programmable gain amplifier (PGA) coupled to receive the down-converted signal and configured to produce an amplified in-going signal,
• wherein at least one LNA includes:
• a first MOSFET device having a gate, a drain and a source terminal;
• first, second and third resistive elements, each further including first and second terminals;
• selectable switch circuitry configured and coupled to the first terminal of at least one of the first, second and third resistive elements;
• amplifier selection circuitry;
• and
• wherein:
• the first terminal of the first resistive element is coupled to the source terminal, the second terminal of the first resistive element is coupled to the first terminal of the second resistive element, the second terminal of the second resistive element is coupled to the first terminal of the third resistive element, and the second terminal of the third resistive element is coupled to circuit common;
• the gate terminal is connected to receive the adjusted in-going RF signal;
• and
• the drain terminal is connected to the amplifier selection circuitry configured to select or deselect the LNA from operation.

A receiver comprising:

• a passive gain stage configured to receive the differential in-going RF signal and a gain control signal to produce a gain adjusted in-going RF signal based on the gain control signal;
• a sliced LNA stage comprising a plurality of low noise amplifiers (LNAs) coupled to receive the gain adjusted in-going RF signal, each LNA having an input to be selected or deselected for gain operations and wherein at least one of the plurality of LNAs includes a source degeneration circuit comprising at least one selectable resistive element;
• and including an adjustable source degeneration circuit wherein each LNA further includes a port for receiving a plurality of gain selection signals and an output port to produce an amplified in-going RF signal;
• mixer circuitry comprising an input coupled to receive the amplified in-going RF signal produced by the at least one LNA, wherein the mixer circuitry is configured to produce a down-converted signal at either an intermediate frequency (IF) or baseband frequency (BB) having in-phase and quadrature phase components;
• a programmable gain amplifier (PGA) coupled to receive the down-converted signal and configured to produce an amplified in-going signal;
• and
• transition circuitry coupled between the input of the at least one of the plurality of LNAs and the selectable resistive element and having an impedance element coupled to a resistive element configured to receive a signal and to gradually apply the signal to the selectable resistive element.

A receiver comprising:

• a passive gain stage having an input to receive an in-going radio frequency (RF) signal and a gain control signal to produce a gain adjusted in-going RF signal;
• a sliced LNA stage comprising a plurality of low noise amplifiers (LNAs) coupled to receive the gain adjusted in-going RF signal and having an output port to produce an amplified in-going RF signal, each of the plurality of LNAs including:
• a first transistor having a drain coupled to a first output of the respective LNA, a gate for receiving a positive component of the gain adjusted in-going RF signal, and a source;
• a second transistor having a drain coupled to a second output of the respective LNA, a control electrode for receiving a negative component of the gain adjusted in-going RF signal, and a source;
• an adjustable source degeneration circuit coupled to the sources of the first and second transistors and responsive to a plurality of gain selection signals to select an amount of source degeneration;
• and
• amplifier selection circuitry coupled between the drains of the first and second transistors and corresponding outputs of the respective LNA, wherein, in a first mode, the amplifier selection circuitry is configured to produce a differential output by producing signals from the drain terminals of the first and second MOSFET devices;
• a mixer comprising an input coupled to receive at least one of the amplified in-going RF signals produced by the sliced LNA stage, wherein the mixer is configured to produce a converted signal at another frequency;
• and
• a programmable gain amplifier (PGA) coupled to receive the converted signal and configured to produce an amplified in-going signal.