DANIEL ARTHUR TITUS
Pilots at Titus Rd, Stonelick, OH
License number
Ohio A3993869
Issued Date
May 2015
Expiration Date
May 2017
Category
Airmen
Type
Authorized Aircraft Instructor
Address
Address
2321 Titus Rd, Stonelick, OH 45103
Professional information
Self-Test Device And Method Having An Amplifier Converted Into An Oscillator
US Patent:
4864639, Sep 5, 1989
Filed:
Sep 28, 1987
Appl. No.:
7/101488
Inventors:
Mark A. Dapore - Cincinnati OH
Daniel A. Titus - Batavia OH
Daniel A. Titus - Batavia OH
Assignee:
Cincinnati Electronics Corporation - Cincinnati OH
International Classification:
H04B 1700, H03F 140
US Classification:
455226
Abstract:
An FM receiver is self tested by connecting a positive feedback network in circuit with a wideband, front end r. f. amplifier of the receiver, so that the amplifier is converted into an oscillator. R. f. and i. f. characteristics of the receiver are determined by comparing the amplitude of an i. f. signal with a predetermined reference value while the amplifier is converted to an oscillator. Noise characteristics of the receiver are determined by comparing the amplitude of an audio frequency signal of the receiver with a predetermined value while the amplifier is converted to an oscillator and the amplifier derives an unmodulated r. f. output. Baseband characteristics of the receiver are determined by varying a reactance in the positive feedback path to impose FM on r. f. oscillations derived by the amplifier and by comparing the amplitude of the output of the audio frequency amplifier with a predetermined value. By varying the value of the reactance in the feedback loop, the oscillating frequency is swept to determine the center operating frequency and i. f.