 Robot pre-positioning in a wafer processing system |
| Synchronized, Conflict Resolving Schedulers An aspect of the present invention comprises a method ... |
|
| Digital interface circuit |
| The subject invention overcomes the disadvantages of the prior art including those mentioned above ... |
|
| Encryption apparatus, cryptographic communication system, key recovery system, and storage medium |
| OF THE INVENTION A preferred embodiment of the present invention will now be described. In the ... |
|
| Broadcast receiver |
| OF THE PREFERRED EMBODIMENT Using the antenna 1, a sterophonic broadcast signal is received, the ... |
|
| Electronic reverberation device |
| I claim: 1. An electronic reverberation device comprising an input amplifier having an input and an ... |
|
| Digit-serial recursive filters |
| OF THE INVENTION The concepts underlying the present invention are best illustrated by an example. ... |
|
| Auscultation augmentation device |
| The main object of the present invention is to provide a compact, battery-powered device to be used ... |
|
| Cryptographic key, or other secret material, recovery |
| According to the present invention there is provided a method permitting secure storage and secure ... |
|
| Music speech filter |
| This invention electronically and automatically determines whether an audio signal is music or ... |
|
|
Tuner station selecting apparatus
| Details |
Inventors: Mishima, Akira; Kubo, Kazuhiko; Usui, Akira;
Assignee: Matsushita Electric Industrial Co., Ltd. (Osaka, JP)
Primary Examiner: Eisenzopf; Reinhard J.
Assistant Examiner: Pham; Chi H.
Attorney, Agent or Firm: Wenderoth, Lind & Ponack
A tuner station apparatus includes a first mixer for combining an input signal and a first local oscillation signal, and a second mixer for combining an output of the first mixer and a second local oscillation signal. The first and second local oscillation signals are generated by first and second PLL circuits, respectively. Each of the first and second PLL circuits include a frequency divider, a variable frequency divider, a phase comparator, a low pass filter, and a voltage controlled oscillator. The frequency divider of the first PLL circuit has a higher frequency division ratio than that of the second PLL circuit. |
|
DETAILED DESCRIPTION Accordingly, a first object of the present invention is to provide an improved tuner station selecting apparatus which is capable of better effecting a station selecting operation.
A second object of the present invention is to provide a tuner station selecting apparatus which is simple in the construction of a tuner metal fitting, and has the same function as before.
In accomplishing these and other objects, according to one preferred embodiment of the present invention, there is provided a tuner station selecting apparatus which includes a first mixer for mixing the signal from a local oscillator of a first PLL circuit with an input signal, and a second mixer for mixing a signal from a local oscillator from a second PLL circuit with a signal from the first mixer, and which is characterized in that the first PLL circuit includes a first pre-frequency-divider to which the output signal of a first local oscillator is given, a first variable frequency divider to which the signal from the first pre-frequency-divider is given, with the frequency division ratio being variable, a first phase comparator to which the output signal of the first variable frequency divider and the reference frequency signal thereof are given, and a first low-pass filter developing a control voltage for controlling the first local oscillator from the output signal of the first phase comparator, the second PLL circuit includes a second pre-frequency-divider to which the output signal of a second local oscillator is given, a second variable frequency divider to which a signal from the second pre-frequency-divider is given, with the frequency division ratio being variable, a second phase comparator to which the output signal of the second variable frequency divider and the reference frequency signal thereof are given, and a second low-pass filter developing the control voltage for controlling the second local oscillator from the output signal of the second phase comparator.
A tuner station selecting apparatus of a second invention is characterized in that a second local oscillation frequency signal from the output terminal of the second intermediate frequency amplifier for amplifying the output signal (second upper, lower signal) of the second mixer is obtained so as to add it into a second re-amplifier
|
|
Audio Signal Processing 
