Journal Forum

Synchronized Swept-Sine: Theory, Application, and Implementation - October 2015

Effect of Microphone Number and Positioning on the Average of Frequency Responses in Cinema Calibration - October 2015
1 comment

The Measurement and Calibration of Sound Reproducing Systems - July 2015

Access Journal Forum

AES E-Library

Transistorized Magnetic and Photoelectric Input Circuits for Motion Picture Projectors

Document Thumbnail

The design of a transistor input stage to work from magnetic stripe on motion picture film through a reproduce head is described. Direct expressions for amplification of induced voltage are given, both with and without series feedback. Similar expressions are given for input impedance, and the effect of input impedance on frequency response is discussed. Photo detectors for use with optical sound tracks and with transistor amplifiers are compared, and a universal input stage using a phototransistor is shown schematically.

JAES Volume 6 Issue 1 pp. 4-9; January 1958
Publication Date:

Click to purchase paper or login as an AES member. If your company or school subscribes to the E-Library then switch to the institutional version. If you are not an AES member and would like to subscribe to the E-Library then Join the AES!

This paper costs $20 for non-members, $5 for AES members and is free for E-Library subscribers.

Learn more about the AES E-Library

E-Library Location:

Start a discussion about this paper!

Facebook   Twitter   LinkedIn   Google+   YouTube   RSS News Feeds  
AES - Audio Engineering Society