H - Electricity – 03 – J
Patent
H - Electricity
03
J
365/12
H03J 5/00 (2006.01)
Patent
CA 1180831
ABSTRACT OF THE DISCLOSURE A television tuner comprises a tuning circuit including a voltage controlled variable capacitance diode. The tuning circuit is housed within a shield casing. The shield casing is provided with a terminal for electrical connection to the variable capacitance diode and the ter- minal is supplied with a tuning voltage from a channel selecting apparatus. A Zener diode is connected between the tuning voltage terminal and the shield casing, whereby the upper limit of the tuning voltage applied to the vari- able capacitance diode is restricted. A predetermined volt- age determinable dependent on the Zener diode is selected such that the tuning frequency established by the tuning circuit, when the predetermined voltage is applied to the variable capacitance diode, may be a predetermined lower limit frequency of a desired receiving frequency band. Ac- cordingly, the tuning frequency is prevented from being changed toward a lower frequency deviating from the corres- ponding variation range of the desired receiving frequency band.
439343
G. Ronald Bell & Associates
Sanyo Electric Co. Ltd.
LandOfFree
Tuner apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Tuner apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Tuner apparatus will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1325110