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Questions tagged [tuner]

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1answer
39 views

Source generator for Satellite Tuner input

I need to design a source generator for a TV factory. They want to automatize the functional tests by applying a test module to the TV's at the end of the production line. All the peripherals of the ...
0
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1answer
63 views

Does the Si4731 / Si47xx provide the necessary info to fetch left/right demodulated audio levels?

I'm working on a project which uses an Si4731 broadcast radio receiver IC (Si47xx family) and which calls for left & right demodulated audio level meters based on a source FM broadcast signal. I ...
2
votes
1answer
551 views

How to empirically tune DQ current PI controllers in BLDC/PMSM motor for vector control?

I need to experimentally set the \$k_p\$ and \$k_i\$ parameters of PI controllers for the DQ-axes of a vector controlled BLDC motor. I have been looking for papers and application notes proposing ...
0
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0answers
68 views

How do I pre-tune and verify a receiver frontend?

In the design and implementation of an RF receiver, I'd like to build and verify it stage by stage, with particular attention to impedance matching, noise figure and gain. If I had access to a ...
2
votes
2answers
133 views

What kind of component was used in this demodulation circuit?

I was trying to gather components as well as some desoldering experience from an old television tuner when I found those little fellows: They were sitting next to an IC with the Code TDA 6160-2X. ...
0
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3answers
129 views

Multi-tuning AM selector

I'm thinking about the design of an AM receiver frontend that needs to select between three channels. The community suggested that I investigate manually wound loop antennas, and they seem like a nice ...
1
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0answers
104 views

Can antenna VSWR be corrected?

For this antenna, which cites a VSWR of 1.4, can that be improved (decreased) with the use of a matching network? Could the matching network be between the feed cable and the board or must it be ...
2
votes
2answers
346 views

Separating an FM antenna from a topology which uses headphone ground as antenna

I have a FM radio module with Silicon Labs Si4703 integrated tuner module for Arduino. The module assumes use of headphones and use of ground wire as an antenna (advice is wire length of 1.1-1.45m). ...
0
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1answer
515 views

LC Tank Tuner for Super Regenerative Radio

There seems to be very little literature to explain the practical construction of a radio and how a super regenerative circuit actually act as a selector, amplifier, how a antenna is actually to be ...
5
votes
4answers
788 views

Is there a clever way to use a small variable capacitor where a larger capacitance is required?

I am designing an activity where students should band pass a song to find a hidden message at 1000Hz. Problem I have considered using a notch filter and tank circuit, but using the formula $$f=\...
-3
votes
1answer
211 views

How to make a tesla coil play music?

I'm building a Tesla Coil for a science project, and I thought it would be cool if I could make it play music. Could somebody tell me how? I'm new to this so please keep it as simple as possible.
0
votes
1answer
449 views

Why am I losing the signal when I attach this RF amp circuit and how can I correct it?

I am trying to follow this circuit diagram: Taken from (http://www.techlib.com/electronics/crystal.html) Using two oscilloscopes I am watching the signal on the tuner circuit and the voltage created ...
0
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2answers
1k views

Make an RF transmitter: classic transistor oscillator or VCO module?

This question is about pros and cons of making an RF transmitter (eg in the FM band) in the classical way (eg. with a "transistor based" oscillator circuit, like this one which is very classic and ...
1
vote
1answer
2k views

IF transformer color codes

Is there any standard color code available for IF transformers? Generally in most of the Japanese radio receivers I see red color slug for MW oscillator, white and yellow slugs in AM IF stage, ...
2
votes
3answers
6k views

How to properly connect and drive varicap diodes?

can someone explain me how to connect and use varicap diodes? Please consider that I am a novice, so would be ok to use a clear and an exhaustive language/terms. Thank you. I often see these ...
1
vote
0answers
558 views

Does the rt2832u chip have enough bandwidth for ATSC?

I'd like to upgrade the audio/infotainment module in my 2009 Camry. I see several off the shelf solutions, but they don't have a builtin digital TV tuner and the processor isn't as fast as I'd like. ...
8
votes
1answer
373 views

Antenna matching network topology

In tuning an antenna, there are multiple possible topologies that will take it to the middle of the smith chart. Some differences that I can see between them are: Component ESR (losses). Effect of ...
1
vote
3answers
187 views

Could transmit/receive turnaround be improved by having a heterodyne receiver switchable between high-side and low-side injection

In some of the small radios I've worked with such as the Nordic Semiconductor 24LE line, there is a significant (100us+) delay between transmitting data and being able to receive a response. By my ...
4
votes
4answers
2k views

How exactly to track oscillator in superhet receiver

The IF is 490 kHz. I have learnt that the local oscillator and the tuning block before the IF stage must "be aware of each other" or track. So in my case, the tuning of both the circuits should differ ...
0
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2answers
197 views

Tuning the radio receiver

I am trying to understand how exactly to tune the Superhet receiver. In my simulations, I have attached to the initial frequency mixer---> A local oscillator and an AC signal source to model the ...
1
vote
3answers
896 views

Tuning a radio wave receiver

Variable capacitors are used in tuning many circuits of radios. I read the theory of basic tuning and resonance frequency. What I understand by changing the capacitor we change the resonance frequency ...