The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
The paper provides a structure of a wide tuning center frequency range VCO (Voltage Controlled Oscillator). The VCO is completed on the base of oscillation theory and negative resistance structure. This circuit has a high stability of output voltage amplitude and can oscillate in a great range of frequencies.
In order to realize a wide-band and low phase noise PLL for digital tuner, the desired tuning range of the PLL describes in this paper is divided into 8 sections according to different L/C tank circuits changed by channel selection, then a coarse-tuning loop is designed in the system to automatically select the suitable one of the 8 tuning curves which have overlapped part besides a fine-tuning loop...
This paper described the design of a broadband LNA for TV tuner. The LNA uses two stage structures to achieve trade off of output impedance match and gain. In order to reduce the NF of the amplifier, noise canceling principle is adopted to cancel the noise. The simulation result shows that, in operation bandwidth 48 MHz~860 MHz, the gain is 24 dB, Noise figure is 3 dB, input impedance and output impedance...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.