Abstract: A method and an apparatus for quantitatively analyzing an enzyme inhibitor are provided. The apparatus includes a memory unit for storing at least one set of parameters, an interface for receiving a test strip, a reflective type optical detection unit for providing a light beam onto the test strip to obtain a test signal, a processor for processing the test signal based on the at least one set of parameters to obtain a quantitative analysis result, and a display unit for outputting the quantitative analysis result.

Abstract: Disclosed is a heterodyne receiver for low noise and image frequency repression, comprising: a low noise amplifier for receiving an input signal from an antenna and amplifying the signal while reducing a noise figure of the input signal; and a frequency converter for receiving both the input signal outputted from the low noise amplifier and a local oscillation signal, filtering the signals to repress gain of the input signal at an image frequency band and increase gain of the input signal at a signal frequency band, and converting the frequency of the signals to the intermediate frequency band.