Signal receiving circuit and method, signal detection circuit
A technology of signal reception and signal detection, applied in the field of signal detection circuit and signal reception circuit, can solve the problem of BMC data signal error signal and so on
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Embodiment 1
[0078] This example is Figure 4 A specific application example of the circuit shown.
[0079] In this example, if Figure 6 As shown, the AC coupling circuit 311 includes: a first capacitor C1; the common mode voltage generation circuit 312 includes: a first resistor R1, a second resistor R2, a third switch S3 and a fourth switch S4; the first The current feedback clamping circuit 313 includes: a first current source I1 , a second current source I2 , a first switch S1 , a second switch S2 and an inverter INV. The resistance values of the first resistor R1 and the second resistor R2 are the same; the first capacitor C1 is a DC blocking capacitor.
[0080] Figure 7 The waveform of the input voltage signal (CC_Input) is shown. combine Figure 7 shown in the waveform, Figure 6 The working principle of the signal receiving circuit shown is:
[0081] The first capacitor C1, the first resistor R1, and the second resistor R2 perform AC coupling on the input voltage signal ...
Embodiment 2
[0085] This example is Figure 5 A specific application example of the circuit shown.
[0086] In this example, if Figure 10 As shown, the filter circuit 314 includes: a second capacitor C2, a third resistor R3; the voltage clamping circuit 315 includes: a fourth resistor R4, a first P-channel metal oxide semiconductor field effect transistor (PMOS) M1 , a first N-channel metal oxide semiconductor field effect transistor (NMOS) M2; the second current feedback clamping circuit 316 includes: a third current source I3, a fourth current source I4, a second NMOS M3 and a second PMOS M4.
[0087] Figure 7 The waveform of the input voltage signal (CC_Input) is shown. combine Figure 7 shown in the waveform, Figure 10 The working principle of the signal receiving circuit shown is:
[0088] The second capacitor C2 and the third resistor R3 filter the input voltage signal (CC_Input), adjust the waveform of the input voltage signal (CC_Input) for the first time, and obtain the ...
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