3 Video Demodulation Block

This circuit separates Y and C signals from a composite video signal. Fig. 7-4 shows the pin configuration of TC9090AN and Fig. 7-5 shows the block diagram. The composite video signal enters pin 3. A fsc (3.58 4.43MHz) output from the video color IC enters pin 19 and is converted into a 4fsc of the drive clock frequency inside the IC. The composite video signal entered is processed at a rate of the clock frequency of the IC and output as Y and C signal. Vrefh (1) VSS1 (T) ADIN (T) VDD1 4 Vrefl...

4 Rgb Signal Process Circuit 41 RGB Signal SW Section

The RGB signals are entered from a high density D-SUB 15 pin. The signals are divided into two systems through buffers, the one is input to RGB video SW section and the other is output from RGB output terminal after the signal is amplified by 6 dB (75W drive) for RGB outputs. The RGB output signals are always developed as long as signals are being supplied to the RGB input terminal. The sync signal is corresponding to HD, VD, CS (composite sync) and SYNC ON G. The HD, VD, CS are connected to...

[j

Fig. 6-12 Memory control signal timing diagram MB40958PF is a 8-bit 3ch bi-polar D A converter which works at a conversion rate of 60 M sample s. The pin configuration of the IC is shown in Fig. 6-13, the pin functions are in table 6-6 and its internal block diagram is in Fig. 614. The peripheral circuit of the D A converter is shown in Fig. 6-15. The reference voltage output terminal is connected to the reference voltage input terminal (pin 37) and supplied with 3V. Accordingly, the output...

2 Inputoutput Signal Switch Circuit

The I O signal switch circuit selects signals (video and audio ) entered and feeds them to later stages and each output terminal. Fig. 7-2 shows the switching section of the audio video signal switch circuit. 2-1. Audio Video Signal Switch Circuit The signal switching for the audio video signal entered is carried out by Q200 SW IC (TA1218N). Each I O signal is connected to Q200 as shown in Fig. 7-2. Each I O control is entirely carried out through I2C bus. The composite video signal is input to...

U U U U U U It

Fig. 6-10 Write control signal timing diagram EPM7032LC44-10 is used for PLD (QX41). This PLD is based on CMOS EE-PROM and a device which can be written and erased electrically. The block diagram of the circuit written in the IC is shown in Fig. 6-11 and its pin configuration is shown in table 6-5. The IC is composed of the divider circuit, which operates PLL circuit (2), and memory control circuit. In the divider circuit, the clock signal divided in four is output in the standard mode...

3 Power Supply Reset Process

In the power supply reset process, a watch dog timer MM1096BS is used as a power supply reset IC QL04 as shown in Fig. 5-1. The reset IC QL04 accepts a clock pulse signal for the watch dog timer which is sent from WDT terminal of the microcomputer, determines the microcomputer is in an abnormal status due to some reason if the clock signal does not exist for about 1s , and sends a reset signal to the RESET terminal of the system microcomputer QL01 . Fig. 5-2 shows the MN1096BS reset timing...

Section I

DESCRIPTION ABOUT CIRCUIT OPERATION 1-2 2-1. Surge Absorber 2-2. Noise Filter 2-3. Rush Current Protection Circuit 1-3 2-4. Smoothing Rectifying Circuit 1-3 2-5. Inverter Circuit 2-6. Primary Control Smoothing Circuit 1-5 2-8. 6V Detection Protection Circuit 1-5 Protection 2-11. Output ON OFF Circuit 1-6 2-12. ON OFF Control Circuit 1-6 1. LAMP HIGH VOLTAGE POWER 1. 2. CIRCUIT DESCRIPTION 4-2 2-1. Level Shifter Q945 - Q953 4-2 2-2. Gamma c Q965 - Q968, R1044 4-4...