Patent ID: 11909361
Assignee: NANJING MILLIWAY MICROELECTRONICS TECHNOLOGY CO., LTD.
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 5:
6. The broadband logarithmic detector with high dynamic range of claim 1, wherein the current summation and driving unit comprises a first field effect transistor F1 and a third field effect transistor F3, the gate of the first field effect transistor F1 is connected respectively to the gate of the second field effect transistor F2, the drain of the first field effect transistor F1, the collector of the twenty-third transistor M23 and the gate of the fifth field effect transistor F5, the gate of the third field effect transistor F3 is connected respectively to the gate of the fourth field effect transistor F4 and the drain of the third field effect transistor F3, the drain of the third field effect transistor F3 serves the input of the current summation and driving unit, the drain of the fourth field effect transistor F4 is connected respectively to the in-phase input of an operational amplifier OP1, one end of a ninth resistor R9 and the drain of a second field effect transistor F2, the inverted-phase input of the operational amplifier OP1 is connected to the output of the operational amplifier OP1, the ground terminal of the operational amplifier OP1 is grounded, the bias terminal of the operational amplifier OP1 is connected to the drain of a fifth field effect transistor F5, the output of the operational amplifier OP1 serves as the output of the current summation and driving unit, the emitter of the twenty-third transistor M23 is grounded through an eighth resistor R8, the base of the twenty-third transistor M23 is connected respectively to the emitter of the twenty-second transistor M22 and the base of the twenty-first transistor M21, the base of the twenty-third transistor M23 is also grounded through a seventh resistor R7, the emitter of the twenty-first transistor M21 is grounded through a sixth resistor R6, the collector of the twenty-first transistor M21 is connected respectively to the base of the twenty-second transistor M22 and one end of an eleventh current source Ib11, the other end of the eleventh current source Ib11 is connected to an external current source, the collector of the twenty-second transistor M22, the source of the first field effect transistor F1, the source of the second field effect transistor F2, the source of the third field effect transistor F3, the source of the fourth field effect transistor F4 and the source of the fifth field effect transistor F5 are all input with a third supply voltage VCC3.