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Description : Coaxial High Pass Filters 850 to 7000 MHz

Features

• low cost

• small size

• 7 sections

• temperature stable

• excellent power handling, 7W

• patent pending



Applications

• sub-harmonic rejection and dc blocking

• transmitters/receivers

• lab use



 


Part Name(s) : NTE851
NTE-Electronic
NTE Electronics
Description : Integrated Circuit VHF/UHF Prescaler

Description:
The NTE851 is an integrated circuit prescaler in a 14–Lead DIP type package intended for use in TV frequency synthesis tuning systems over an input frequency range of 90 to 1000MHz. It performs division by 256 in he UHF mode and division by 64 in the VHF mode.
The mode of operation can be selected by means of the bandswitch and the separate UHF and VHF input pins provided. The output is a complementary emitter–coupled stage with controlled slew rate for harmonic suppression.
All input pins should be AC coupled to the appropriate input signal source. Because of high sensitivity, unbuffered coupling from the local oscillator is possible in most cases. In the UHF mode, which is activated by applying a high level to the bandswitch input pin, all eight divider stages are operative, resulting in division by 256. In the VHF mode, activated by a low level at the VHF input pin, two divider stages are bypassed, resulting in division by 64. As a result, approximately the same range of output frequencies are generated fo both the UHF and VHF TV bands. An internal amplifier/multiplexer pro vides this control while isolating both inputs and amplifying the VHF signal. In addition, hrmonic output is reduced above 40MHz by limiting output signal rise and fall times and maintaining a balanced load.

Features:
● Broadband Operation: 90 to 1000MHz
● High Sensitivity
● Standard 5V power Supply
● Dual Mode Operation: VHF/UHF
● Complementary ECL Outputs
● Independent VHF & UHF Input Pins

Description : VHF I / VHF II / UHF-Tuner IC

Features
● Few external components
● Frequency and amplitude-stable unbalanced oscillator for the VHF I-frequency range
● Frequency and amplitude-stable balanced oscillators for the VHF II- and UHF-frequency range
● Optimum decoupling of input frequency from oscillator
● Double balanced mixer with wide dynamic range and highimpedance inputs for the VHF I-frequency range
● Double balanced mixer with wide dynamic range and lowimpedance inputs for the VHF II- and UHF-frequency range
● Low-impedance SAW-filter driver output
● SAW-filter driver with high signal-handling capability
● Internal band switch
● Low-noise, internal reference voltage
● Integrated 1st IF-bandpass filter

Part Name(s) : UPC3207GR UPC3207GR-E1
NEC
NEC => Renesas Technology
Description : FREQUENCY DOWN CONVERTER FOR VHF TO UHF BAND RECEIVER

DESCRIPTION

The µPC3207GR is a Silicon monolithic IC designed for receiver applications. This IC consists of a double balanced mixer (DBM), local oscillator, preamplifier for precscaler operation, IF amplifier, regulator, UHF/VHF switching circuit, and so on. This one-chip IC covers a wide frequency band from VHF to UHF bands. This IC is packaged in 20-pin SSOP (Shrink Small Outline Package) suitable for surface mounting.



FEATURES

VHF to UHF bands operation.

• Low distortion CM: VHF (@fRF = 470 MHz) 96 dBµ

                           UHF (@fRF = 890 MHz) 92 dBµ

• Supply voltage : 9 V

• Packaged in 20-pin SSOP suitable for surface mounting



APPLICATIONS

• Tuners for TV and VCR

• Receivers for VHF to UHF bands


Philips
Philips Electronics
Description : Low power mixers/oscillators for hyperband tuners

GENERAL DESCRIPTION
The TDA5744 and TDA5745 are 2-band mixers/oscillators intended for VHF/UHF and hyperband tuners (see Fig.1).
The Integrated Circuits (ICs) include two double balanced mixers and two oscillators, for the VHF and UHF band, and an IF amplifier. With proper oscillator application and by using a switchable inductor to split the VHF band into two sub-bands (the full VHF/UHF and hyperband) the TV bands can be covered. Two pins are available between the mixer output and the IF amplifier input to enable IF filtering for improved signal handling. Band selection is made by band switch pin BS.

FEATURES
• Mixers/oscillators for hyperband tuners
• Balanced mixer with a common emitter input for VHF (single input)
• Balanced mixer with a common base input for UHF (double input)
• 4-pin common emitter oscillator for VHF
• 4-pin common emitter oscillator for UHF
• Electronic band switch
• IF amplifier with a low output impedance to drive the SAW filter directly (≈2 kΩ load)
• Low power, low radiation and small size
• Pin compatible single-chip synthesizer mixer/oscillator for Full Scale Tuners (FST) are available: TDA6404, TDA6405 and TDA6405A.

APPLICATIONS
• Hyperband tuners for Europe using a 2-band mixer/oscillator in a switched concept.

Part Name(s) : TDA5630BT
Philips
Philips Electronics
Description : 9 V VHF and UHF mixer/oscillator for TV and VCR cable tuners

GENERAL DESCRIPTION
The TDA5630BT is a monolithic integrated circuit that performs VHF and UHF mixer/oscillator functions in TV and VCR cable tuners. With a proper oscillator application and by using a switchable inductor to split the VHF band into two sub-bands, the full VHF/UHF TV bands can be covered. This low-power mixer/oscillator requires a power supply of 9 V and is available in a very small package.

FEATURES
• Balanced mixer with a common emitter input for band A (single input)
• 2-pin oscillator for band A
• Balanced mixer with a common base input for band C
• 3-pin oscillator for band C
• Local oscillator buffer output for external prescaler
• SAW filter preamplifier with a low output impedance to drive a SAW filter
• Band gap voltage stabilizer for oscillator stability
• Electronic band switch.

APPLICATIONS
• Cable tuners for TV and VCR (switched concept for VHF)
• Recommended RF bands for Europe: 48.25 to 105.25 MHz, 112.25 to 294.25 MHz and 471.25 to 855.25 MHz
• Recommended RF bands for the USA: 55.25 to 133.25 MHz, 139.25 to 361.25 MHz and 367.25 to 801.25 MHz.

Description : PLL Tuned UHF and VHF Audio/Video High Integration Modulator

Device Overview
Figure 2 shows a simplified block diagram of the MC44BC373C/4C device. The MC44BC373C/4C device has three main sections:
1. A high speed I2C-compatible bus section
2. A PLL section to synthesize the UHF/VHF output channel frequency (from an integrated UHF oscillator, divided for VHF output)
3. A modulator section, which accepts audio and video inputs, then uses them to modulate the UHF/VHF carrier

An on-chip video test pattern generator with an audio test signal is included.

Features
MC44BC373C: Multi-Standard PAL/SECAM/NTSC Modulator
MC44BC374C: PAL/NTSC only Modulator
The channel is set by an on-chip high-speed I2C compatible bus receiver. A Phase-Locked Loop (PLL) tunes the modulator over the full UHF range.
The modulator incorporates a sound subcarrier oscillator and uses a second PLL to derive 4.5, 5.5, 6.0, and 6.5MHz subcarrier frequencies. These frequencies are selectable using the bus.
The modulation standard can be chosen using a control bit that selects between System L or System B/G (MC44BC373C only).
The picture-to-sound ratio may be adjusted using the bus. In addition, an on-chip video test pattern generator can be switched ON with a 1KHz audio test signal.
The MC44BC373C/4C also has the following features:
    • No external varicaps diodes/inductor or tuned components
    • Channel 21-69 UHF operation
    • VHF range possible by internal dividers (30MHz–450MHz)
    • Integrated on-chip programmable UHF oscillator
    • Extremely low external components count
    • High speed read and write I2C-bus compatible (800kHz)
    • Fixed video modulation depth (80% in PAL and 90% in SECAM)
    • Peak White Clip disabled via the bus
    • Programmable picture/sound carrier ratio (12dB and 16dB)
    • Integrated on-chip programmable sound subcarrier oscillator (4.5MHz to 6.5MHz)—No external varicaps
    • On-chip video test pattern generator with sound test signal (1kHz)
    • Low-power programmable modulator standby mode
    • Transient output inhibit during PLL Lock-up at power-ON
    • Logical Output Port controlled by bus
    • Custom masked versions with unique start-up settings possible (no I2C bus programming required)
    • Extremely robust ESD protection, minimum 4kV, typical 6kV

Description : 9 V VHF and UHF mixers/oscillators for TV and VCR cable tuners

DESCRIPTION

The TDA5632 and TDA5633 are monolithic integrated circuits that perform VHF and UHF mixer/oscillator functions in TV and VCR cable tuners. With correct oscillator application and by using a switchable inductor to

split the VHF band into two sub-bands, the full VHF/UHF TV bands can be covered. These low-power mixers/oscillators require a power supply of 9 V and are available in a very small package.



FEATURES

• Balanced mixer with a common emitter input for band A

• 2-pin oscillator for band A

• Balanced mixer with a common base input for band C

• 4-pin oscillator for band C

• Local oscillator buffer output for external prescaler

• SAW filter preamplifier with a low output impedance to drive a 75 Ω load

• Band gap voltage stabilizer for oscillator stability

• Electronic band switch

• External IF filter connected between the mixer output and the IF amplifier input.



APPLICATIONS

• Cable tuners for TV and VTR; switched concept for VHF

• Recommended RF bands for Europe:

   48.25 to 105.25 MHz, 112.25 to 294.25 MHz and  471.25 to 855.25 MHz

• Recommended RF bands for the USA:

55.25 to 133.25 MHz, 139.25 to 361.25 MHz and 367.25 to 801.25 MHz.


Part Name(s) : NTE313
NTE-Electronic
NTE Electronics
Description : Silicon NPN transistor High Gain, Low Noise, VHF Mixer and VHF/RF Amp

Description:

The NTE 313 is a silicon NPN transistor specifically designed for VHF mixer and VHF/RF amplifier applications. This device features high power gain, low noise, and excellent forward AGC characteristics.



 


Part Name(s) : UPC2794GS UPC2794GS-E1
NEC
NEC => Renesas Technology
Description : FREQUENCY DOWN CONVERTER FOR VHF TO UHF BAND TV/VCR TUNER

DESCRIPTION
The µPC2794GS is a Silicon monolithic IC designed for TV/VCR tuner applications. This IC consists of a double balanced mixer (DBM), local oscillator, preamplifier for precscaler operation, IF amplifier, regulator, UHF/VHF switching circuit, and so on. This one-chip IC covers a wide frequency band from VHF to UHF bands. This IC is packaged in 20-pin SOP (Small Outline Package) suitable for surface mounting.

FEATURES
VHF to UHF bands operation.
• Low distortion CM: VHF (@fRF = 470 MHz) 96 dBµ
                                 UHF (@fRF = 890 MHz) 92 dBµ
• Supply voltage : 9 V
• Packaged in 20-pin SOP suitable for surface mounting

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