Amplifier and associated receiver

1. An amplifier, receiving an input signal and provides an output signal, comprising:

A gain stage, includes an input end and a branch terminal, the input terminal is coupled to the input signal;

A main branch circuit, comprises a 1st end of the output end of the with a current mode, the 1st end is coupled to the branch terminal, the main branch circuit which is used to output the output signal of the output terminal;

An auxiliary branch circuit, comprising a feedback end and a 2nd, the 2nd end is coupled to the branch terminal; and

A feedback circuit, coupled to the feedback between the with the input end.

2. Amplifier according to Claim 1, wherein the output end is less than the voltage swing of the voltage swing of the feedback.

3. Amplifier according to Claim 1, wherein the main branch circuit is used at the output end to provide an output impedance, and conduct a current to a load impedance, wherein the output impedance is greater than the load impedance.

4. Amplifier according to Claim 1, wherein the input end to the output end is smaller than the the voltage gain of the voltage of the input to the feedback gain.

5. Amplifier according to Claim 1, wherein on the basis of the auxiliary branch circuit flows to the branch terminal of the electric current change of the 1st to the input for providing a voltage change, the gain changes according to the voltage to the branch terminal drive a electric current change of the 2nd, the 2nd and the 1st electric current change of the electric current change of the out-of-phase.

6. As in claim 1 wherein the amplifier further comprises:

A bridge circuit, is coupled to the output end of the between the feedback end, is used to convert the feedback signal from the outside to the output terminal, and the feedback is coupled to the DC bias voltage of the output terminal.

7. Amplifier according to Claim 6, wherein the bridge circuit is used for with the output end of the feedback of a resistance value of 1st, the feedback circuit is used for the input terminal and the feedback resistance offer a 2nd, 1st and 2nd is greater than the resistance value of the resistance value.

8. Amplifier according to Claim 1, wherein the gain stage comprises a 1st transistor, is provided with a 1st gate, a drain and a 1st 1st source, are respectively coupled with the input end, the branch terminal with a supply voltage; the auxiliary branch circuit includes a 2nd transistor, is provided with a 2nd gate, a drain and a 2nd 2nd source, a 2nd are respectively coupled with the bias voltage, the feedback end of the with the 2nd; the main branch circuit comprises a 3rd transistor, is provided with a 3rd gate, a drain and a 3rd 3rd source, a 1st are respectively coupled with the bias voltage, the output terminal and the branch terminal.

9. Amplifier according to Claim 8, wherein the 3rd cutting of the transistor of the transistor is greater than the 2nd than cutting.

10. Amplifier according to Claim 8, wherein the 1st 2nd bias voltage voltage and the bias voltage is associated with a temperature-dependent current.

11. Amplifier according to Claim 1, further comprises:

1st default number of regulating branch circuit, each of the regulating branch circuit comprises a 3rd end and a current mode of the output end of the adjustment, the 3rd end is coupled to the branch terminal, and the regulating branch circuit is selectively actuates the can according to the input signal of the output end of the corresponding adjusted to provide a regulated output signal.

12. Amplifier according to Claim 11, further comprises:

A 2nd default number of adjusting bridge circuit, each of the adjustment bridge circuit is coupled with the two corresponding the regulating branch circuit between the output of the adjustment.

13. Amplifier according to Claim 11, wherein the feedback circuit is used for with the input end of the feedback resistance value of a, and the resistance value is adjusted according to the enabling of the changes in the number of branch circuits.

14. A receiver, comprising:

An amplifier, an input terminal for receiving an input signal and provides an output signal, and comprises:

A main branch circuit, comprises a current mode output, the output is used for

Ends of the output the output signal; and

An auxiliary branch circuit, is coupled with the input end, is used for the input end of the input matching;

Wherein the main branch circuit and the auxiliary branch circuit connected to a branched end further pair ; and

A mixer, is coupled to the amplifier, which is used for a carrier signal and the output signal of mixed to provide a mixed signal; and

A secondary amplifier, via a current-mode interface is coupled to the mixer, according to the mixed signal to provide an internal signal.

15. Receiver according to Claim 14, wherein the auxiliary branch circuit comprises a feedback, and the amplifier further comprises:

A gain stage, comprises a 1st transistor, is provided with a 1st gate, a drain and a 1st 1st source, are respectively coupled with the input end, the branch terminal with a supply voltage; and

A feedback circuit, coupled to the feedback between the with the input end.

16. Receiver according to Claim 14, wherein the main branch circuit and the auxiliary branch circuit according to a 1st respectively with a bias voltage of the bias voltage and operation of the 2nd, and the receiver further comprises:

A bias circuit, in order to on the basis of a temperature-dependent current the provision of the bias voltage voltage and 1st 2nd bias voltage.

17. Receiver according to Claim 14, wherein the amplifier further comprises:

1st default number of regulating branch circuit, each of the regulating branch circuit comprises a 3rd end and a current regulating the output mode, all the regulating branch circuit end coupled to the branched end of the 3rd, and the regulating branch circuit is selectively enabled according to the input signal of the output end of the corresponding adjusted to provide a regulated output signal;

Wherein the the mixer adjusting branch circuit wherein one of the adjusting output signal is mixed with the carrier signal to provide the mixed signal.

18. Receiver according to Claim 17, wherein the amplifier further comprises:

2nd-default number of adjusting bridge circuit, each of the adjustment bridge circuit is coupled with the two corresponding the regulating branch circuit between the output of the adjustment.

19. Receiver according to Claim 17, wherein

The auxiliary branch circuit comprises a feedback, and the amplifier further comprises: a feedback circuit, coupled to the feedback between the with the input end;

The feedback circuit with feedback in order to be used in the provision of a resistance value between the input terminal, and the resistance value is adjusted according to the enabling of the changes in the number of branch circuits.

20. The receiver includes a plurality of amplifier according to Claim 14, the amplifier

The input terminal common is coupled together, the output end of the amplifier is common to connect together; wherein each of the amplifier can be selectively and actuates disability.

21. Receiver according to Claim 20, wherein

The auxiliary branch circuit comprises a feedback, and the amplifier further comprises: a feedback circuit, coupled to the feedback between the with the input end;

Each of the feedback circuit of the amplifier for with the input end of the feedback resistance value of a, and the resistance value is is enabled according to the number of changes of the amplifier.

22. Receiver according to Claim 14, wherein the secondary amplifier includes a variable resistance, is coupled to the current-mode interface with the provision of the internal signal nodes of a node, which is used for adjusting the mixing signal and the internal signal of the gain.