Patent ID: 9161112
Filing Date: 2015-10-13
Classification: H03K,H04R

Abstract:
1. A single wire programmable Micro Electromechanical System (MEMS) microphone comprising: an MEMS sensor for implementing acoustic-electric conversion; an Application Specific Integrated Circuit (ASIC) chip, which is connected to the MEMS sensor, the ASIC chip comprises an OUT interface; the ASIC chip comprises a main circuit module, a one time programmable (OTP)/control circuit module, an interface circuit module, and an OTP memory, an input end of the interface circuit is connected to the OUT interface, one output end of the interface circuit is connected to the main circuit module, and other output end of the interface circuit is connected to the OTP/control circuit module, the OTP/control circuit module is connected to the OTP memory, the interface circuit is used for controlling the main circuit module and the OTP/control circuit module to work in a programmable state or a normal working state according to a voltage of the OUT interface, and the OTP/control circuit module controls the read/write of the OTP memory; and when output signal of the OUT interface is not strongly driven into a high level, the ASIC chip is started normally, when output signal of the OUT interface is at the high level, the ASIC chip enters a programming mode.