データシートサーチシステム |
|
TDA1593T データシート(PDF) 5 Page - NXP Semiconductors |
|
TDA1593T データシート(HTML) 5 Page - NXP Semiconductors |
5 / 20 page 1996 Oct 10 5 Philips Semiconductors Product specification IF amplifier/demodulator for FM car radio receivers TDA1593 FUNCTIONAL DESCRIPTION The limiter amplifier has five stages of IF amplification using balanced differential limiter amplifiers with emitter follower coupling. Decoupling of the stages from the supply voltage line and an internal high-ohmic DC feedback loop give a very stable IF performance. The amplifier gain is virtually independent of changes in temperature. The FM demodulator is fully balanced and compromises two cross-coupled differential amplifiers. The quadrature detection of the FM signal is performed by direct feeding of one differential amplifier from the limiter amplifier output, and the other via an external 90 degrees phase shifting network. The demodulator has a good stability and a small zero-cross-over shift. The bandwidth of the demodulator output is restricted by an internal low-pass filter to approximately 1 MHz. Non-linearities, which are introduced by demodulation, are compensated by the THD compensation circuit. For this reason, the demodulator resonance circuit (between pins 10 and 11) must have a loaded Q-factor of 19. Consequently, there is no need for the demodulator tuned circuit to be adjusted for minimum distortion. Adjustment criterion is a symmetrical stop pulse. The control voltage for the mute attenuator (pin 16) is derived from the values of the level detector and the detuning detector output signals. The mute attenuator has a fast attack and a slow decay determined by the capacitor on pin 16. The AF signal is fed via the mute attenuator to the output (pin 4). A weighted control voltage (pin 6) is obtained from the mute attenuator control voltage via a buffer amplifier that introduces an additional voltage shift and gain. The level detector generates a voltage output signal proportional to the amplitude of the input signal. The unweighted level detector output signal is available. The open-collector tuning stop output voltages STOP-0 and STOP-1 (pins 15 and 14) are derived from the detuning and the input signal level. The pins 14 and 15 may be tied together, if only one tuning-stop output is required. TDA1593 MBE513 1 2 3 4 5 6 7 8 9 18 17 16 15 14 13 12 11 10 VP LVA ULV Vref VoAF WLV DDV DEMI1 DEMI2 TSW ST0 ST1 MUTE LFB1 GND ViIF LFB2 n.c. Fig.2 Pin configuration for DIP-version. TDA1593T MBE514 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 VP LVA ULV Vref VoAF WLV DDV n.c. n.c. DEMI1 DEMI2 TSW ST0 ST1 MUTE LFB1 GND ViIF LFB2 n.c. Fig.3 Pin configuration for SO-version. |
同様の部品番号 - TDA1593T |
|
同様の説明 - TDA1593T |
|
|
リンク URL |
プライバシーポリシー |
ALLDATASHEET.JP |
ALLDATASHEETはお客様のビジネスに役立ちますか? [ DONATE ] |
Alldatasheetは | 広告 | お問い合わせ | プライバシーポリシー | リンク交換 | メーカーリスト All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |