Oscillators – With frequency adjusting means – Step-frequency change
Patent
1999-03-23
2000-10-17
Grimm, Siegfried H.
Oscillators
With frequency adjusting means
Step-frequency change
315399, 348540, H03L 700, H04N 505
Patent
active
061338036
ABSTRACT:
A horizontal deflection circuit (61) includes a horizontal oscillator circuit (51) having a horizontal oscillation IC (1). A terminal (T12) of the horizontal oscillation IC (1) is connected to respective first ends of capacitors (8a, 8b). The capacitor (8a) has a second end grounded. The capacitor (8b) has a second end connected to a collector terminal of a transistor (9). The transistor (9) has an emitter terminal grounded through a resistor (11), and a base terminal grounded through a capacitor (13) and connected to a terminal (T121) of a microprocessor (12) through a resistor (14). The horizontal oscillation IC (1) receives a voltage (VT71) at a terminal (T13) thereof and a feedback voltage (VT31) at a terminal (T15) thereof. The circuit (51) generates a signal (VT14) synchronized with a horizontal synchronizing signal (HD) applied to a terminal (T11) to output the signal (VT14). The horizontal deflection circuit prevents stresses from being applied to a horizontal output circuit when the frequency of the input signal is changed.
REFERENCES:
patent: 4705993 (1987-11-01), Kashiwagi
Grimm Siegfried H.
Mitsubishi Denki & Kabushiki Kaisha
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