PROGRAMMABLE GAIN AMPLIFIER WITH CONTROLLED GAIN STEPS

Provided is a programmable gain amplifier that includes controlled gain steps that dynamically control an output voltage in real-time. The programmable gain amplifier includes a first transistor and asecond transistor that includes respective control ports, input ports, and output ports. The programmable gain amplifier also includes a resistor connected to the output ports of the transistors. Further, at least a third transistor is connected to the output ports, in parallel with the resistor. On applying a control voltage to the third transistor and applying an input voltage to the first control port, the second control port is selectively modified by the control voltage to produce a desired output at the first input port and the second input port. 所提供的是种可编程增益放大器，其包括即时动态控制输出电压的受控增益阶。可编程增益放大器包括第晶体管与第二晶体管，其包括相应控制接口、输入接口与输出接口。可编程增益放大器亦包括与该等晶体管的输出接口连接的电阻器。再者，至少第三晶体管与该电阻器并联而连接至该等输出接口。旦施加控制电压至该第三晶体管及施加输入电压至该第控制接口，该第二控制接口选择性遭由该控制电压修改，以在该第输入接口及该第二输入接口处产生所欲输出。