Abstract:
PROBLEM TO BE SOLVED: To provide a television receiver or tuner which is integrated in a single circuit device; and a method of processing an RF signal used for a harmonic rejection mixer. SOLUTION: This television receiver and tuner are each provided with respective mixer devices 111 and 220 for respectively converting RF signals to a plurality of respective intermediate signals to be demodulated. At least either of the respective mixer devices 111 and 220 includes a harmonic rejection mixer. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a receiver structure, especially for digital television broadcasting service. SOLUTION: This structure has at least one first frequency translation unit (2) which has a signal input part, a local oscillator input unit, and an output unit. At least one first frequency translation unit (2) is designed so that a signal applied to the input side can be changed into an intermediate frequency. Further, it has a first amplifier (6a). This first amplifier is designed to comprise a gain for guaranteeing signal level attenuation of a filter (7) connected to the downstream of the first amplifier (6a). The first amplifier (6a) is connected with an output portion of the frequency translation unit (2). Further, it has an intermediate frequency amplifier (8) comprising a variable gain coefficient. This intermediate frequency amplifier is connected with the first amplifier (6). At least one first frequency translation unit (2) and the first amplifier (6a) are formed in a common semiconductor body (1). COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a high-frequency signal filtering circuit device that needs only fewer circuit technology and semiconductor manufacturing technology cost than those of the conventional circuit device, while keeping the same filtering quality. SOLUTION: This high frequency signal filtering circuit device has a terminal receiving a control signal, an oscillator able to control the frequency so as to control the resonance frequency, at least one filter having an adjustable pass band with respect to a valid signal, and a device that supplies a correction signal. The high-frequency signal filtering circuit device is characterized, in that the filter includes a frequency revision element having 1st and 2nd terminals, the 1st terminal is coupled with the terminal which receives the control signal, the device is provided with a terminal for the correction signal, and the terminal is coupled with the 2nd terminal of the frequency revision element.
Abstract:
The invention relates to a circuit consisting of two regulatable amplification devices (DA, AA), the signal output (2) of the first amplification device (DA) being connected to the signal input (4) of the second amplification device (AA), and the first amplification device (DA) comprising a digital input (3) for regulating the amplification thereof and the second amplification device (AA) comprising an input (5) for the same purpose. According to the invention, the input (5) for regulating the amplification of the second amplification device (AA) is connected to the input (3) for regulating the amplification of the first amplification device (DA) by a specific means, in such a way that a change in the amplification of the second amplification device (AA) in one direction is caused by a change in the amplification of the first amplification device (DA) in the opposite direction, by means of regulation, such that the entire amplification remains essentially the same.
Abstract:
Ausgangsstufe, umfassend: – einen Signaleingang (1), einen Stelleingang (6) und einen Signalausgang (3); – ein erstes Transistorpaar (P11, P12) mit einem ersten Leitfähigkeitstyp, wobei ein erster Transistor (P11) und ein zweiter Transistor (P12) des ersten Transistorpaares (P11, P12) mit jeweils einem ersten Anschluss (114, 115) an einen ersten Schaltungsknoten (7) angeschlossen sind; – eine erste Stromquelle, die an den ersten Schaltungsknoten (7) angeschlossen ist; – ein zweites Transistorpaar (N11, N12) mit einem zweiten Leitfähigkeitstyp, wobei ein erster Transistor (N11) und ein zweiter Transistor (N12) des zweiten Transistorpaares (N11, N12) mit jeweils einem ersten Anschluss (111, 112) an einen zweiten Schaltungsknoten (8) angeschlossen sind; – eine zweite Stromquelle, die an den zweiten Schaltungsknoten (8) angeschlossen ist; – einen ersten Stromspiegel (4) mit einem Stromspiegeltransistor (P22) von dem ersten Leitfähigkeitstyp, der mit dem Signalausgang (3) verbunden ist; – einen zweiten Stromspiegel (5) mit einem Stromspiegeltransistor (N22) von dem zweiten Leitfähigkeitstyp, der mit dem Signalausgang (3) verbunden ist; wobei – der Signaleingang (1) mit Steueranschlüssen der ersten Transistoren (P11, N11) des ersten und zweiten Transistorpaares verbunden ist; – der Stelleingang (6) mit Steueranschlüssen der zweiten Transistoren (P12, N12) des ersten und zweiten Transistorpaares verbunden ist; – ein zweiter Anschluss des zweiten Transistors (P12) des ersten Transistorpaares (P11, P12) mit dem zweiten Stromspiegel (5) verbunden ist und – ein zweiter Anschluss des zweiten Transistors (N12) des zweiten Transistorpaares (N11, N12) mit dem ersten Stromspiegel (4) verbunden ist, dadurch gekennzeichnet, dass der erste Transistor (P11, N11) und der zweite Transistor (P12, N12) von zumindest einem von dem ersten Transistorpaar (P11, P12) und dem zweiten Transistorpaar (N11, N12) unterschiedliche Geometrieparameter aufweisen.
Abstract:
According to one or more aspects of the present invention, a receiver arrangement is disclosed that is configured to receive digital television signals. The receiver arrangement has at least one first frequency conversion device with the signal input, a local oscillator input and an output. The at least one first frequency conversion device is designed to convert a signal which is applied to the input side to an intermediate frequency. A first amplifier is also provided and is designed with amplification in order to compensate for the signal level loss in a filter which is connected downstream from the first amplifier. The first amplifier is coupled to the output of the frequency conversion device. An intermediate-frequency amplifier with a variable gain factor is also provided, and is coupled to the first amplifier. At least the at least one first frequency conversion device the first amplifier are formed in a common semiconductor body.
Abstract:
Output stage includes signal input (1), setting input (6) and signal output (3). There is first transistor pair (P11,12), whose transistors are coupled at first terminal (114,115) to circuit node (7), to which is linked first current source. First transistor pair is of first conductivity. Second transistor pair (N11,12) of second conductivity has its transistors coupled each with first terminal (111,112) of second circuit node (8), to which is linked second current source. Two current mirrors (4,5) of different conductivity are coupled to signal output and further connection details are specified. Independent claims are included for amplifying loop with invented output stage and for use of this output stage for amplifying radio signal.
Abstract:
A circuit arrangement includes two adjustable amplification devices where the signal output of the first amplification device is connected to the signal input of the second amplification device. The first amplification device has a digital input for controlling its gain and the second amplification device has an input for controlling its gain. The input for gain control in the second amplification device is connected to the input for controlling the gain of the first amplification device via a means such that a change in the gain of the second amplification device in one direction is effected by a change in gain, brought about by means of the control, in the first amplification device in the opposite direction such that the total gain remains essentially the same.
Abstract:
A circuit arrangement includes two adjustable amplification devices where the signal output of the first amplification device is connected to the signal input of the second amplification device. The first amplification device has a digital input for controlling its gain and the second amplification device has an input for controlling its gain. The input for gain control in the second amplification device is connected to the input for controlling the gain of the first amplification device via a means such that a change in the gain of the second amplification device in one direction is effected by a change in gain, brought about by means of the control, in the first amplification device in the opposite direction such that the total gain remains essentially the same.