A high bandwidth signal modulation method is proposed for fast response detector signal acquisition.Several PIN photoelectron detectors are analyzed as an example of fast response detector.According to the analysis results

a signal modulation framework is given

and an experimental circuit is designed and implemented according to the modulation method.A typical signal which has 50ns pulse width and 20nA~0.1mA current is tested using this circuit.PMT9215B is tested under the same condition as a comparison.Experimental result shows that the designed circuit has a very good response to a 40ns width signal

and the impulse response has a lead edge about 10ns.The signal bandwidth of the designed circuit is about 35MHz.A 2-dimensional array detector with 432 PIN diodes is designed using the proposed technique.The system has a dynamical range of 56dB

and good response to fast light signal which proves the correctness and practice of the signal modulation method.