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Index 73

The FM demodulation circuit

Published:2011/6/20 9:39:00 Author:Seven | Keyword: FM demodulation

In the figure is the FM demodulation circuit instance, which converts the FM central frequency(10.7 MHz) into the low-frequency signal with 560B. The 560B chip contains the phase comparator, amplifier and voltage control oscillator. When the voltage control oscillator is synchronized with the input signal, the circuit engages in FM demodulation by using the character that the control voltage is proportional to the input signal frequency. When the maximum bias frequency is 75KHz from the central frequency of 10.7MHz, the low-frequency voltage peak value of the corresponding FM wave is 0.21v. (View)

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The Jinbei-Sea lion SY6480A2L-ME bus circuit

Published:2011/6/23 2:28:00 Author:qqtang | Keyword: Jinbei, Sea lion

The Jinbei-Sea lion SY6480A2L-ME bus circuit is shown in the figure. (View)

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The single spot injection circuit of Jinbei-Sea lion SY6480A2F-E bus

Published:2011/6/23 3:29:00 Author:qqtang | Keyword: single spot, injection circuit, Jinbei

The single spot injection circuit of Jinbei-Sea lion SY6480A2F-E bus is shown as above. (View)

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MOSFET variable RF gain control circuit

Published:2011/6/16 11:46:00 Author:John | Keyword: variable RF

]In the two kinds of MOSFET circuits, the fixed bias network is used to set the gate G2 with a positive DC voltage. It can be replaced with a variable voltage circuit, just as shown in the figure. The potentiometer in the figure can be used as RF gain control device, in order to reduce the gain impact on the strong signal and increase the gain on the weak signal. This design allows the active shunts to prevent strong signal form overloading. figure: MOSFET variable RF gain control circuit (View)

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The Buick-Royaum, Shanghai, V6 car circuit

Published:2011/6/19 20:24:00 Author:qqtang | Keyword: Buick-Royaum, V6, 3.6L

The Buick-Royaum, Shanghai, V6 car circuit is shown in the figure. Figure 1. The Buick-Royaum, Shanghai, V6 car serial communication circuit (with ABS-TCS/ESP) (View)

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The SBX1483—11/12/51/52 typical application circuit

Published:2011/6/20 11:51:00 Author:Seven | Keyword: typical application circuit

Figure: The SBX1483—11/12/51/52 typical application circuit (View)

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The TA7657P typical application circuit

Published:2011/6/20 22:42:00 Author:Seven | Keyword: typical application circuit

Figure: The TA7657P typical application circuit (View)

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The TA814lS typical application circuit

Published:2011/6/20 22:44:00 Author:Seven | Keyword: typical application circuit

The TA814lS typical application circuit (View)

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The TDA3048 typical application circuit

Published:2011/6/20 22:43:00 Author:Seven | Keyword: typical application circuit

Figure: The TDA3048 typical application circuit (View)

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The 50Hz time based signal generator circuit

Published:2011/6/19 20:07:00 Author:qqtang | Keyword: time based, signal generator

The 50Hz time based signal generator circuit
(View)

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The decimal additive counter circuit

Published:2011/6/21 6:14:00 Author:qqtang | Keyword: decimal, additive counter

In the figure is an example of the decimal additive counter circuit, which splits the input frequency in the decimal method, so it is called the decimal counter, and this is also the basic form of digital counters. (View)

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The ring formed counter circuit

Published:2011/6/21 6:08:00 Author:qqtang | Keyword: ring formed, counter

In the circuit is an example of the ring formed counter circuit, the period of the circuit is 4 hours, and the circuit is widely used in all kinds of counter circuit. (View)

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The pulse accumulation counter circuit

Published:2011/6/21 6:24:00 Author:qqtang | Keyword: pulse, accumulation counter

In the figure is the example of the pulse accumulation counter circuit, which engages in pulse accumulative counting of A terminal, and it is used in the counting of input pulses. The S1～S4 are the reset switch, which are used to set the countered numbers. When the numbers are accumulated to the set values, the circuit is taking action, and the corresponding circuit of the relay control is taking action. If the time pulse in Figure 5-12 is added on A terminal, which can also compose a digital timing circuit base on the power supply frequency. (View)