Method of using integrated transmitter and receiver front end module

Patent metadata

Field	Value
Publication number	US-2021028811-A1
Application number	US-202017066113-A
Country	US
Kind code	A1
Filing date	Oct 8, 2020
Priority date	Nov 8, 2012
Publication date	Jan 28, 2021
Grant date	—

Abstract

A method includes switching a receiver path network of a front-end module to a first matching mode in a receive mode. The method further includes switching a transmitter path network of the front-end module to a first resonance mode in the receive mode. The method further includes switching the transmitter path network to a second matching mode in a transmit mode. The method further includes switching the receiver path network to a second resonance mode in the transmit mode.

First claim

What is claimed is:

1 . A method comprising:
switching a receiver path network of a front end module to a first matching mode in a receive mode; switching a transmitter path network of the front end module to a first resonance mode in the receive mode; switching the transmitter path network to a second matching mode in a transmit mode; and switching the receiver path network to a second resonance mode in the transmit mode.

2 . The method of claim 1 , wherein switching the receiver path network to the first matching mode comprises:
reducing capacitance of a first switchable capacitance unit of the receiver path network.

3 . The method of claim 2 , wherein switching the receiver path network to the first matching mode further comprises:
increasing capacitance of a second switchable capacitance unit of the receiver path network.

4 . The method of claim 1 , wherein switching the transmitter path network to the first resonance mode comprises:
establishing a path to ground through an inductor of the transmitter path network.

5 . The method of claim 4 , wherein switching the transmitter path network to the first resonance mode further comprises:
reducing capacitance of a switchable capacitance unit of the transmitter path network.

6 . The method of claim 1 , wherein switching the transmitter path network to the second matching mode comprises:
biasing a first transistor of a power amplifier of the transmitter path network; and inputting signals from a transmitter to a second transistor of the power amplifier.

7 . A method comprising:
setting a transmitter path network of a front-end module (FEM) to a first impedance in a standby mode; setting a receiver path network of the FEM to a second impedance in the standby mode; switching the receiver path network to a first matching mode in a receive mode; switching the transmitter path network to a first resonance mode in the receive mode; switching the transmitter path network to a second matching mode in a transmit mode; and switching the receiver path network to a second resonance mode in the transmit mode.

8 . The method of claim 7 , wherein switching the receiver path network to the second resonance mode comprises controlling at least one switch in the receiver path network to cause the receiver path network to function as an LC resonator.

9 . The method of claim 7 , wherein switching the transmitter path network to the first resonance mode comprises controlling at least one switch in the transmitter path network to cause the transmitter path network to function as an LC resonator.

10 . The method of claim 7 , further comprising connecting a power amplifier in the transmitter path network to a transmitter during the transmit mode.

11 . The method of claim 7 , further comprising connecting a power amplifier in the transmitter path network to a bias voltage in the transmit mode.

12 . The method of claim 7 , wherein switching the receiver path network to the second resonance mode comprises shunting all capacitors in a tunable capacitance unit to ground.

13 . The method of claim 7 , wherein switching the receiver path network to the first match mode comprises selectively electrically connecting a plurality of capacitors in a tunable capacitance unit in parallel.

14 . The method of claim 7 , wherein switching the transmitter path network to the second matching mode comprises increasing a capacitance of a switchable capacitance unit of the transmitter path network.

15 . The method of claim 7 , wherein switching the receiver path network to the first matching mode occurs simultaneously with switching the transmitter path network to the first resonance mode.

16 . The method of claim 7 , wherein switching the transmitter path network to the second matching mode occurs simultaneously with switching the receiver path network to the second resonance mode.

17 . A method comprising:
simultaneously switching, in a receive mode, a receiver path network of a front-end module (FEM) to a first matching mode and a transmitter path network of the FEM to a first resonance mode; and simultaneously switching, in a transmit mode, the transmitter path network to a second matching mode and the receiver path network to a second resonance mode.

18 . The method of claim 17 , wherein switching the receiver path network to the first matching mode comprises reducing capacitance of a first switchable capacitance unit of the receiver path network, and switching the transmitter path network to the first resonance mode comprises reducing capacitance of a second switchable capacitance unit of the transmitter path network.

19 . The method of claim 17 , further comprising setting the transmitter path network to a first impedance in a standby mode, wherein the first impedance is different from an impedance of the transmitter path network in the first resonance mode.

20 . The method of claim 17 , further comprising setting the receiver path network to a first impedance in a standby mode, wherein the first impedance is different from an impedance of the receiver path network in the second resonance mode.

Assignees

• Taiwan Semiconductor Mfg Co Ltd

Inventors

• Yeh En-Hsiang
• Liu Monsen
• Wang Chuei-Tang

Classifications

• H04B1/0458

  Arrangements for matching and coupling between power amplifier and antenna or between amplifying stages (matching circuits in general H03H) · CPC title

• H04B1/18

  Input circuits, e.g. for coupling to an antenna or a transmission line (coupling networks between antennas or lines and receivers independent of the nature of the receiver H03H) · CPC title

• H04B1/48 Primary

  in circuits for connecting transmitter and receiver to a common transmission path, e.g. by energy of transmitter {(H04B1/46 takes precedence)} · CPC title