Transmitter/receiver apparatus, transmitter apparatus and transmitting/receiving method

Patent metadata

Field	Value
Publication number	US-9838068-B2
Application number	US-201415027767-A
Country	US
Kind code	B2
Filing date	Oct 15, 2014
Priority date	Oct 22, 2013
Publication date	Dec 5, 2017
Grant date	Dec 5, 2017

Abstract

A transmitter/receiver apparatus including: a transmitter/receiver terminal; a switching amplifier that includes a low-side switching element connected between a ground terminal and a pulse output terminal and a high-side switching element connected between the pulse output terminal and a power supply terminal and that outputs a pulse signal from the pulse output terminal; a filter that passes therethrough and outputs as a transmitted signal a predetermined frequency component of the pulse signal from a transmitter terminal; and a transmit/receive switch unit that switches the connection status between the transmitter/receiver terminal and the transmitter terminal and also switches the connection status between the transmitter/receiver terminal and a receiver terminal. During receiving, on the basis of the connection status between the transmitter/receiver terminal and the transmitter terminal, the low-side and high-side switching elements are fixed to conductive and non-conductive states, respectively, to non-conductive and conductive states, respectively, or both to non-conductive states.

First claim

The invention claimed is:

1. A transmitter/receiver apparatus, comprising:
a transmitter/receiver terminal that is shared between transmitting of a transmitted signal and receiving of a received signal;
a switching amplifier that includes a low-side switching element connected between a ground terminal and a pulse output terminal, a high-side switching element connected between the pulse output terminal and an electric power supply terminal, and a filter for passing a predetermined frequency component of a pulse signal and outputting the pulse signal filtered from a transmitter terminal as the transmitted signal, and that outputs the pulse signal from the pulse output terminal; and
a transmit/receive switch unit that switches a connection status between the transmitter/receiver terminal and the transmitter terminal and switches a connection status between the transmitter/receiver terminal and a receiver terminal for receiving input of the received signal; and
during the receiving, based on the connection status between the transmitter/receiver terminal and the transmitter terminal, the low-side switching element and the high-side switching element are respectively fixed to a conductive state and a non-conductive state, to the non-conductive state and the conductive state, or to the non-conductive state and the non-conductive state.

2. The transmitter/receiver apparatus according to claim 1 , wherein:
the transmit/receive switch unit connects the transmitter/receiver terminal and the transmitter terminal during the transmitting, and connects the transmitter/receiver terminal and the receiver terminal during the receiving; and
during the transmitting, the low-side switching element and the high-side switching element are set up to be in the conductive state and the non-conductive state respectively, or in the non-conductive state and the conductive state respectively based on complementary two-level pulse input signals that form the transmitted signal, and during the receiving, the low-side switching element and the high-side switching element are fixed to the conductive state and the non-conductive state respectively, to the non-conductive state and the conductive state respectively, or to the non-conductive state and the non-conductive state respectively.

3. The transmitter/receiver apparatus according to claim 1 , wherein:
the transmit/receive switch unit includes a receiver unit connecting unit that, during the transmitting, disconnects the transmitter/receiver terminal and the receiver terminal, and during the receiving, connects the transmitter/receiver terminal and the receiver terminal, and that consistently connects the transmitter/receiver terminal and the transmitter terminal; and
during the transmitting, the low-side switching element and the high-side switching element are set up to be in the conductive state and the non-conductive state respectively, or in the non-conductive state and the conductive state respectively based on complementary two-level pulse input signals that form the transmitted signal, and during the receiving, the low-side switching element and the high-side switching element are fixed to the non-conductive state and the non-conductive state, respectively.

4. The transmitter/receiver apparatus according to claim 3 , wherein:
the receiver unit connecting unit includes a switch circuit that includes a diode and a transmission line.

5. The transmitter/receiver apparatus according to claim 3 , wherein:
the transmit/receive switch unit has a switch circuit that includes a field-effect transistor.

6. The transmitter/receiver apparatus according to claim 1 , further comprising:
a first digital modulation unit including:
a first delta-sigma modulator that receives input of an I component out of the I component and a Q component of a wireless modulation signal, and converts the I component into an one-bit digital signal, the I component and the Q component being orthogonal to each other;
a second delta-sigma modulator that receives input of the Q component, and converts the Q component into an one-bit digital signal;
a clock generator that generates a second clock signal formed by repeating a three-level pattern of (0, 1, 0, −1) based on a first clock signal;
a first mixer that multiplies an output of the first delta-sigma modulator by the second clock;
a second mixer that multiplies an output of the second delta-sigma modulator by a delayed second clock which is generated by delaying the second clock by one clock of the first clock signal; and
an adder that adds an output of the first mixer and an output of the second mixer; and

the low-side switching element and the high-side switching element are driven by an output signal of the adder, and a complementary signal of the output signal of the adder, respectively.

7. The transmitter/receiver apparatus according to claim 1 , further comprising:
a second digital modulation unit including:
a polar coordinate converter that receives input of an I component and a Q component of a wireless modulation signal which are orthogonal to each other, and outputs an amplitude component and a phase component of the wireless communication signal;
a third delta-sigma modulator that converts the amplitude component into an one-bit digital signal;
an oscillator that outputs a carrier pulse which has a repetition frequency identical to a carrier frequency;
a third mixer that multiplies the phase component by an output of the oscillator; and
a fourth mixer that multiplies an output of the third delta-sigma modulator by an output of the third mixer; and

the low-side switching element and the high-side switching element are driven by an output signal of the fourth mixer, and a complementary signal of the output signal of the fourth mixer respectively.

8. The transmitter/receiver apparatus according to claim 1 , further comprising:
an antenna that is connected with the transmitter/receiver terminal.

9. The transmitter/receiver apparatus according to claim 1 , wherein:
the transmit/receive switch unit switches between connection of the transmitter/receiver terminal with the transmitter terminal, and connection of the transmitter/receiver terminal with the receiver terminal at a predetermined time interval.

10. A transmitter apparatus, comprising:
a switching amplifier that includes a low-side switching element connected between a ground terminal and a pulse output terminal and a high-side switching element connected between the pulse output terminal and an electric power supply terminal, and that outputs a pulse signal from the pulse output terminal; and
a filter that passes a predetermined frequency component of the pulse signal, and outputs a filtered pulse signal from a transmitter terminal as a transmitted signal, wherein
in a transmitter/receiver device that transmits the transmitted signal generated from the pulse signal, and receives a received signal from outside, during the receiving, at least one of the low-side switching element and the high-side switching element is fixed to a cut-off state.

11. The transmitter apparatus according to claim 10 , further comprising:
a first digital modulation unit including:
a first delta-sigma modulator that receives input of an I component out of the I component and a Q component of a wireless modulation signal, and converts the I component into an one-bit digital signal;
a second delta-sigma modulator that receives input of the Q component, and converts the Q component into an one-bit digital signal;
a clock generator that generates a second clock formed by repeating a three-level pattern of (0, 1, 0, −1) on the basis of a first clock signal;
a first mixer th

Assignees

• Nec Corp

Inventors

• Kunihiro Kazuaki
• Hori Shinichi

Classifications

• H04B1/44 Primary

  Transmit/receive switching · CPC title

• H04L27/36

  Modulator circuits; Transmitter circuits · CPC title

• H03F2200/294

  the amplifier being a low noise amplifier [LNA] · CPC title

• H03F2200/451

  the amplifier being a radio frequency amplifier · CPC title

• H04L27/38

  Demodulator circuits; Receiver circuits · CPC title