US 8,805,296 B2Granted

Field programmable transceiver circuits

AssigneeLime Microsystems Limited

InventorsRobin James Miller, Srdjan Milenkovic, Ebrahim Bushehri

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Abstract

A transceiver circuit includes: a transmit path with at least one of each of a digital to analog converter converting a digital input signal to an analog signal, a filter, a first frequency synthesizer, a mixer to produce an RF output, and an amplifier amplifying the RF output for transmission; and a receive path with at least one of each of a second amplifier amplifying a received RF input, a second frequency synthesizer, a second mixer to produce a baseband signal, a second filter, and an analog to digital converter converting the baseband signal to a digital output signal; at least one switch selectively connecting different points of the circuit thereby to bypass at least one component of the circuit; and a control input connected to the switch to receive control signals for controlling operation of the switch.

Claims20

Dependent claims

A transceiver circuit comprising a transmit path and a receive path, the transmit path comprising an input for receiving a digital input signal, digital to analogue conversion means for converting the digital input signal to an analogue signal, filtering means for filtering the analogue signal, first frequency synthesizing means for producing a first synthesized RF signal, mixing means for mixing the analogue signal with the RF signal to produce an RF output, and amplifying means for amplifying the RF output for transmission, the amplifying means having an output;

and the receive path comprising an input for receiving an RF input, second amplification means for amplifying the RF input, second frequency synthesizing means for generating a second synthesized RF signal, second mixing means for mixing the amplified RF input with the second synthesized RF signal to produce a baseband signal, second filtering means for filtering the baseband signal, and analogue to digital conversion means for converting the baseband signal to a digital output signal, and an output for the digital output signal, switching means arranged to selectively connect together different points of the circuit thereby to bypass at least one component of the circuit and a control input means connected to the switching means and arranged to receive control signals for controlling operation of the switching means, and at least one further input and one further output connected to the at least one component whereby the at least one component can be connected for use in a different application.

A transceiver circuit comprising a transmit path and a receive path, the transmit path comprising an input for receiving a digital input signal, at least one digital to analogue converter for converting the digital input signal to an analogue signal, at least one filter for filtering the analogue signal, at least one first frequency synthesizer for producing a first synthesized RF signal, at least one mixer for mixing the analogue signal with the RF signal to produce an RF output, and at least one amplifier for amplifying the RF output for transmission, the at least one amplifier having an output;

and the receive path comprising an input for receiving an RF input, at least one second amplifier for amplifying the RF input, at least one second frequency synthesizer for generating a second synthesized RF signal, at least one second mixer for mixing the amplified RF input with the second synthesized RF signal to produce a baseband signal, at least one second filter for filtering the baseband signal, and at least one analogue to digital converter for converting the baseband signal to a digital output signal, and an output for the digital output signal, at least one switch arranged to selectively connect together different points of the circuit thereby to bypass at least one component of the circuit and a control input connected to the at least one switch and arranged to receive control signals for controlling operation of the at least one switch, and at least one further input and one further output connected to the at least one component whereby the at least one component can be connected for use in a different application.

Dependencies are inferred from the claim text.