BACKGROUND

In a wireless communication device, a receiver needs to meet a certain dynamic range. When there is a large interference signal in the signal received by the receiver, an Analog-to-Digital Converter may have an overflow phenomenon, and a useful signal cannot be demodulated accurately, and thus the gain of the entire receiving link needs to be reduced, so that an overflow threshold cannot be reached when a large signal enters the ADC, and the useful signal may be demodulated normally.

SUMMARY

The disclosure relates generally to technologies for designing a circuit structure, and more specifically to an amplifier circuit structure and a method for controlling circuit.

Various embodiments of the disclosure provide an amplifier circuit structure, including an amplifier, a first switch and a second switch; herein, the amplifier is located in a main path, an input end of the amplifier is a signal input end of the amplifier circuit structure, the first switch is located in a bypass; one end of the second switch is a signal output end of the amplifier circuit structure, and the other end of the second switch is configured to selectively connect to a signal output end of the bypass or a signal output end of the main path; and

the first switch and the second switch are configured to control their respective operating states when a first instruction is received, so that the main path is connected to the signal input end of the amplifier circuit structure and the signal output end of the amplifier circuit structure; and to control their respective operating states when a second instruction is received, so that the bypass is connected to the signal input end of the amplifier circuit structure and the signal output end of the amplifier circuit structure.

In some embodiments of the disclosure, the amplifier circuit structure further includes at least one phase compensation circuit, and the at least one phase compensation circuit is configured to perform phase compensation for a phase difference caused when the main path and the bypass receive an input signal.

In some embodiments of the disclosure, the at least one phase compensation circuit is located between an output end of the amplifier and the signal output end of the main path.

In some embodiments of the disclosure, the at least one phase compensation circuit is located between the first switch and the signal output end of the bypass.

In some embodiments of the disclosure, the at least one phase compensation circuit includes a first phase compensation circuit and a second phase compensation circuit; and

herein, the first phase compensation circuit is located between an output end of the amplifier and the signal output end of the main path, and the second phase compensation circuit is located between the first switch and the signal output end of the bypass.

In some embodiments of the disclosure, one of the first phase compensation circuit and the second phase compensation circuit is configured to perform phase lead compensation, and the other of the first phase compensation circuit and the second phase compensation circuit is configured to perform phase lag compensation.

In some embodiments of the disclosure, the phase shift of the at least one phase compensation circuit is determined according to a center frequency point of the input signal.

In some embodiments of the disclosure, when the number of the phase compensation circuits for the at least one phase compensation circuit is greater than 1, the at least one phase compensation circuit includes two phase compensation circuits with different phase shift change parameters, the phase shift change parameters indicate correspondences of the phase shifts and frequencies.

In some embodiments of the disclosure, the first switch is a Single Pole Single Throw (SPST) switch.

The embodiments of the disclosure further provide a method for controlling circuit, which is applied to an amplifier circuit structure including an amplifier, a first switch and a second switch; herein, the amplifier is located in a main path, an input end of the amplifier is a signal input end of the amplifier circuit structure, the first switch is located in a bypass; one end of the second switch is a signal output end of the amplifier circuit structure, and the other end of the second switch is configured to selectively connect to a signal output end of the bypass or a signal output end of the main path, the method including:

controlling, by the first switch and the second switch, their respective operating states when a first instruction is received, so that the main path is connected to the signal input end of the amplifier circuit structure and the signal output end of the amplifier circuit structure; and controlling, by the first switch and the second switch, their respective operating states when a second instruction is received, so that the bypass is connected to the signal input end of the amplifier circuit structure and the signal output end of the amplifier circuit structure.

In the amplifier circuit structure and the method for controlling circuit provided by the embodiments of the disclosure, the amplifier circuit structure includes an amplifier, a first switch and a second switch; herein, the amplifier is located in a main path, an input end of the amplifier is a signal input end of the amplifier circuit structure, the first switch is located in a bypass; one end of the second switch is a signal output end of the amplifier circuit structure, and the other end of the second switch is configured to selectively connect to a signal output end of the bypass or a signal output end of the main path; and the first switch and the second switch are configured to control their respective operating states when a first instruction is received, so that the main path is connected to the signal input end of the amplifier circuit structure and the signal output end of the amplifier circuit structure; and to control their respective operating states when a second instruction is received, so that the bypass is connected to the signal input end of the amplifier circuit structure and the signal output end of the amplifier circuit structure.

In this way, the embodiments of the disclosure may provide high signal isolation between the main path and the bypass by adding the first switch to the bypass; when the input signal passes through the main path for signal amplification, the input signal does not pass through the first switch of the bypass, and the turn-on resistance (Ron) when the first switch is switched off is reduced, so that the insertion damage of the amplifier circuit structure is relatively low; when the input signal passes through the bypass to output, the first switch is turned on, the bypass is in a direct passing state, and the amplifier on the main path stops operating, which may provide high isolation from the main path. Generally speaking, it is beneficial to reduce the insertion damage of the input end of the amplifier of the main path, and is beneficial to reduce the noise factor of the cascaded link including the amplifier circuit structure.

