PHYS 105 1nd Edition Lecture 35Outline of Last Lecture I. Electrical Circuits Outline of Current Lecture II. Amplifiers III. Analog signals and dynamic range IV. Number systems and digitization Current LectureI. Amplifiers - Boost the output to a normal detectable level - Need power amplifier to boost the power for loudspeaker system- AM/FM tunero AM wave May be become small at certain times, it is susceptible to noise Limited fidelity and no possibility of stereo sound o FM wave Amplitude remains constant and less susceptible to noise Larger bandwidth, and offers stereo channel sound Receiver station is in direct line of sight II. Analog signals and dynamic range - Sound waves in air, electric signals in electronic circuit and our neuron-pulses - Easily amplified, filtered, and reproduced by electronic devices - Analog signal is susceptible to noise and thus has relatively small dynamic range - DR = 20log (V/∆V)III. Number systems and digitization - Unit of 1 or 0 is called 1 bit - 2 bit system represents 00, 01, 10 and 11- 8-bit system has 256 combinations - First binary digit is called the most significant bit - Last binary digit is called the least significant bit - 8-bit unit is called 1 byte - 32-bit unit is called 4 bytes These notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a
View Full Document
Unlocking...